diff --git a/Gemfile b/Gemfile
index 87593b00..42b81940 100644
--- a/Gemfile
+++ b/Gemfile
@@ -29,6 +29,8 @@ gem "terser"
 gem "rswag-api"
 gem "rswag-ui"
 gem "seed-fu"
+gem "devise", "~> 4.9"
+gem "rails-controller-testing"
 
 group :development do
   gem "better_errors"
@@ -60,5 +62,3 @@ group :test do
   gem "climate_control"
   gem "timecop"
 end
-
-gem "devise", "~> 4.9"
diff --git a/Gemfile.lock b/Gemfile.lock
index b4dc3ed4..fbcbe5fb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -280,6 +280,10 @@ GEM
       activesupport (= 7.2.2.1)
       bundler (>= 1.15.0)
       railties (= 7.2.2.1)
+    rails-controller-testing (1.0.5)
+      actionpack (>= 5.0.1.rc1)
+      actionview (>= 5.0.1.rc1)
+      activesupport (>= 5.0.1.rc1)
     rails-dom-testing (2.2.0)
       activesupport (>= 5.0.0)
       minitest
@@ -497,6 +501,7 @@ DEPENDENCIES
   pry-rails
   puma (~> 6.0)
   rails (~> 7.2)
+  rails-controller-testing
   rails_layout
   rollbar
   rspec-rails
diff --git a/app/controllers/officer/decisions_controller.rb b/app/controllers/officer/decisions_controller.rb
new file mode 100644
index 00000000..c9575181
--- /dev/null
+++ b/app/controllers/officer/decisions_controller.rb
@@ -0,0 +1,21 @@
+class Officer::DecisionsController < ApplicationController
+  def new
+    @application_decision = AssessmentDecisionForm.new(application_decision: nil)
+  end
+
+  def create
+    application = LandingApplication.find(params[:landing_application_id])
+    @application_decision = AssessmentDecisionForm.new(application_decision: params.dig(:assessment_decision_form, "application_decision"))
+
+    application.application_decision = @application_decision.application_decision
+
+    if @application_decision.valid?
+      application.application_decision_made_at = Time.current
+      application.assessor = current_user
+      application.save
+      redirect_to(officer_landing_applications_path)
+    else
+      render :new
+    end
+  end
+end
diff --git a/app/forms/assessment_decision_form.rb b/app/forms/assessment_decision_form.rb
new file mode 100644
index 00000000..add34e54
--- /dev/null
+++ b/app/forms/assessment_decision_form.rb
@@ -0,0 +1,22 @@
+class AssessmentDecisionForm
+  include ActiveModel::Model
+
+  attr_accessor :application_decision, :application_decision_made_at
+
+  def initialize(application_decision:)
+    @application_decision = application_decision
+  end
+
+  validates :application_decision,
+    presence: {
+      message: "Select either 'Approve' or 'Deny'"
+    }
+
+  validate :ensure_decision_valid
+
+  def ensure_decision_valid
+    unless LandingApplication.application_decisions.key?(application_decision)
+      errors.add(:application_decision, "Select either 'Approve' or 'Deny'")
+    end
+  end
+end
diff --git a/app/models/landing_application.rb b/app/models/landing_application.rb
index 7ddbebe6..4648df61 100644
--- a/app/models/landing_application.rb
+++ b/app/models/landing_application.rb
@@ -1,3 +1,7 @@
 class LandingApplication < ApplicationRecord
   belongs_to :destination, foreign_key: :destination_id, class_name: "LandableBody"
+
+  belongs_to :assessor, foreign_key: :assessor_id, class_name: "User", optional: true
+
+  enum :application_decision, [:approved, :denied], validate: {allow_nil: true}
 end
diff --git a/app/models/user.rb b/app/models/user.rb
index 092233cc..0f206fb6 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,3 +1,5 @@
 class User < ApplicationRecord
   devise :database_authenticatable, :recoverable
+
+  has_many :assessed_applications, class_name: :LandingApplication, foreign_key: :assessor_id
 end
diff --git a/app/views/officer/decisions/new.html.erb b/app/views/officer/decisions/new.html.erb
new file mode 100644
index 00000000..660385e9
--- /dev/null
+++ b/app/views/officer/decisions/new.html.erb
@@ -0,0 +1,17 @@
+<main class="govuk-main-wrapper">
+  <section class="container">
+    <h1 class='govuk-heading-l'>Assess a landing application</h1>
+  
+    <%= form_for @application_decision, method: :post, url: officer_landing_application_decisions_path do |form| -%>
+      <%= form.govuk_error_summary %>
+      
+      <%= form.govuk_radio_buttons_fieldset :application_decision, legend: { text: 'Do you approve this application for landing?' } do %>
+        <%= form.govuk_radio_button :application_decision, 'approved', label: { text: 'Approve' }, link_errors: true %>
+        <%= form.govuk_radio_button :application_decision, 'denied', label: { text: 'Deny' } %>
+      <% end %>
+      
+      <%= form.govuk_submit "Save and continue"%>
+    <% end %>
+</section>
+</main>
+  
\ No newline at end of file
diff --git a/app/views/officer/landing_applications/index.html.erb b/app/views/officer/landing_applications/index.html.erb
index b3b9a5de..c68300a9 100644
--- a/app/views/officer/landing_applications/index.html.erb
+++ b/app/views/officer/landing_applications/index.html.erb
@@ -1,7 +1,6 @@
 <main class="govuk-main-wrapper">
   <section class="container">
     <h1 class='govuk-heading-l'>Landing applications</h1>
-
     <%= govuk_table do |table|
       table.with_caption(size: 'm', text: 'Applications to assess')
       
@@ -26,7 +25,7 @@
             row.with_cell(text: application.landing_date)
             row.with_cell(text: application.departure_date)
             row.with_cell(text: application.application_submitted_at.to_date, html_attributes: { id: "submission-date" })
-            row.with_cell(text: '')
+            application.application_decision ? row.with_cell(text: application.application_decision.capitalize, html_attributes: { id: "application-#{application.id}" }) : row.with_cell {govuk_button_link_to 'Make a decision', new_officer_landing_application_decision_path(landing_application_id: application.id), secondary: true, class: "govuk-!-margin-bottom-0", html_attributes: { id: "application-#{application.id}" }}
           end
         end
       end
@@ -34,6 +33,5 @@
     end
       
       %>
-
   </section>
 </main>
diff --git a/config/routes.rb b/config/routes.rb
index bc8a00f7..5fef59fd 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -27,7 +27,9 @@
   end
 
   namespace :officer do
-    get :"landing-applications", to: "landing_applications#index"
+    resources :landing_applications, path: "landing-applications", only: :index do
+      resources :decisions, only: [:new, :create]
+    end
   end
 
   namespace :api do
diff --git a/db/fixtures/development/02_landing_applications.rb b/db/fixtures/development/02_landing_applications.rb
index e45e3b8e..64d6336e 100644
--- a/db/fixtures/development/02_landing_applications.rb
+++ b/db/fixtures/development/02_landing_applications.rb
@@ -16,13 +16,25 @@ def seed
           landing_date = landing_date(temporality: seed.fetch(:temporality))
           s.landing_date = landing_date
           s.departure_date = up_to_twelve_days_ahead(landing_date)
-          s.application_submitted_at = upto_forty_five_days_before(landing_date)
+
+          application_submitted_at = upto_forty_five_days_before(landing_date)
+          s.application_submitted_at = application_submitted_at
+
+          application_decision = [:approved, :denied, nil].sample
+          s.application_decision = application_decision
+          if [:approved, :denied].include?(application_decision)
+            s.application_decision_made_at = between_submission_and_landing_dates(landing_date, application_submitted_at)
+          end
 
           s.application_reference = ApplicationReferenceGenerator.generate
         end
       end
     end
 
+    def between_submission_and_landing_dates(landing_date, submission_date)
+      rand(submission_date..landing_date)
+    end
+
     def up_to_twelve_days_ahead(landing_date)
       landing_date + rand(1..12).days
     end
diff --git a/db/migrate/20240909125011_add_user_association_to_landing_application.rb b/db/migrate/20240909125011_add_user_association_to_landing_application.rb
new file mode 100644
index 00000000..d4c34604
--- /dev/null
+++ b/db/migrate/20240909125011_add_user_association_to_landing_application.rb
@@ -0,0 +1,5 @@
+class AddUserAssociationToLandingApplication < ActiveRecord::Migration[7.2]
+  def change
+    add_reference :landing_applications, :assessor, foreign_key: {to_table: :users}, type: :uuid
+  end
+end
diff --git a/db/migrate/20240913140449_add_decision_enum_to_landing_application.rb b/db/migrate/20240913140449_add_decision_enum_to_landing_application.rb
new file mode 100644
index 00000000..4f1de0f6
--- /dev/null
+++ b/db/migrate/20240913140449_add_decision_enum_to_landing_application.rb
@@ -0,0 +1,5 @@
+class AddDecisionEnumToLandingApplication < ActiveRecord::Migration[7.2]
+  def change
+    change_column :landing_applications, :application_decision, :integer
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 443a29d6..dd95187c 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -39,11 +39,13 @@
     t.date "departure_date", null: false
     t.string "application_reference", null: false
     t.datetime "application_submitted_at", null: false
-    t.string "application_decision"
     t.datetime "application_decision_made_at"
     t.string "permit_id"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.uuid "assessor_id"
+    t.integer "application_decision"
+    t.index ["assessor_id"], name: "index_landing_applications_on_assessor_id"
     t.index ["destination_id"], name: "index_landing_applications_on_destination_id"
   end
 
@@ -60,4 +62,5 @@
   end
 
   add_foreign_key "landing_applications", "landable_bodies", column: "destination_id"
+  add_foreign_key "landing_applications", "users", column: "assessor_id"
 end
diff --git a/spec/controllers/officer/decisions_controller_spec.rb b/spec/controllers/officer/decisions_controller_spec.rb
new file mode 100644
index 00000000..8641f254
--- /dev/null
+++ b/spec/controllers/officer/decisions_controller_spec.rb
@@ -0,0 +1,64 @@
+require "rails_helper"
+
+RSpec.describe Officer::DecisionsController do
+  let(:officer) do
+    FactoryBot.create(:user)
+  end
+
+  before { sign_in officer }
+
+  describe "GET to :new" do
+    context "when officer is signed in"
+    it "calls AssessmentDecisionForm.new" do
+      allow(AssessmentDecisionForm).to receive(:new)
+
+      get :new, params: {landing_application_id: "abc123"}
+
+      expect(AssessmentDecisionForm).to have_received(:new).with(application_decision: nil)
+    end
+  end
+
+  describe "POST to :create" do
+    context "when a valid decision is submitted"
+    it "updates the application and redirects to the landing applications index page" do
+      form = instance_double(AssessmentDecisionForm, "valid?" => true, "application_decision" => "denied")
+      allow(AssessmentDecisionForm).to receive(:new).and_return(form)
+
+      landing_application = instance_double(LandingApplication, "valid?" => true, :save => double, "application_decision=" => "denied", "application_decision_made_at=" => Time.current, "assessor=" => officer)
+      allow(LandingApplication).to receive(:find).and_return(landing_application)
+
+      post :create, params: {landing_application_id: "abc123", assessment_decision_form: {application_decision: "denied"}}
+
+      expect(landing_application).to have_received(:save)
+      expect(response).to redirect_to(officer_landing_applications_path)
+    end
+
+    context "when no decision is submitted"
+    it "doesn't save the application and renders :new" do
+      form = instance_double(AssessmentDecisionForm, "valid?" => false, "application_decision" => nil)
+      allow(AssessmentDecisionForm).to receive(:new).and_return(form)
+
+      landing_application = instance_double(LandingApplication, "valid?" => false, :save => double, "application_decision=" => nil)
+      allow(LandingApplication).to receive(:find).and_return(landing_application)
+
+      post :create, params: {landing_application_id: "abc123", assessment_decision_form: {application_decision: nil}}
+
+      expect(landing_application).not_to have_received(:save)
+      expect(response).to render_template("new")
+    end
+
+    context "when a non-enum value is submitted"
+    it "doesn't save the application and renders :new" do
+      form = instance_double(AssessmentDecisionForm, "valid?" => false, "application_decision" => "proved")
+      allow(AssessmentDecisionForm).to receive(:new).and_return(form)
+
+      landing_application = instance_double(LandingApplication, :save => double, "application_decision=" => "proved")
+      allow(LandingApplication).to receive(:find).and_return(landing_application)
+
+      post :create, params: {landing_application_id: "abc123", assessment_decision_form: {application_decision: "proved"}}
+
+      expect(landing_application).not_to have_received(:save)
+      expect(response).to render_template("new")
+    end
+  end
+end
diff --git a/spec/factories/landing_applications.rb b/spec/factories/landing_applications.rb
index b141caca..14aafc0e 100644
--- a/spec/factories/landing_applications.rb
+++ b/spec/factories/landing_applications.rb
@@ -1,6 +1,7 @@
 FactoryBot.define do
   factory :landing_application do
     association(:destination, factory: :landable_body)
+    association(:assessor, factory: :user)
     pilot_email { "alan@nasa.org.uk" }
     pilot_name { "Alan Oliver" }
     pilot_licence_id { "1233ABC00123" }
diff --git a/spec/features/officer/assess_landing_application_spec.rb b/spec/features/officer/assess_landing_application_spec.rb
new file mode 100644
index 00000000..219fb6de
--- /dev/null
+++ b/spec/features/officer/assess_landing_application_spec.rb
@@ -0,0 +1,78 @@
+# frozen_string_literal: true
+
+# Feature: Officer assesses a landing application
+#   So that a landing permit can be issued if appropriate
+#   As an officer assessing a landing application
+#   I want to record my decision (accepted or rejected)
+
+RSpec.feature "Officer assesses a landing application" do
+  # Scenario: Officer views landing application decision page
+  #   Given there are existing applications in the database
+  #   When I select make a decision on an application on the application list page
+  #   Then I should see the application decision page
+
+  before do
+    create_applications
+    @first_application_id = LandingApplication.first.id
+    sign_in FactoryBot.create(:user)
+  end
+
+  scenario "Officer views landing application decision page" do
+    visit officer_landing_applications_path
+    when_i_select_make_a_decision
+    then_i_should_see_the_decision_page
+  end
+
+  # Scenario: Officer assesses a landing application
+  #   Given I am on the application decision page
+  #   When I complete the form
+  #   Then I should be redirected back to the list of application
+  #   And I should see my decision
+
+  scenario "Officer assesses a landing application" do
+    visit new_officer_landing_application_decision_path(landing_application_id: @first_application_id)
+    when_i_complete_the_form
+    then_i_should_be_redirected_to_application_list_page
+    and_i_should_see_my_decision
+  end
+
+  # Scenario: Officer completes form incorrectly
+  #   Given I am on the application decision page
+  #   When I fail to enter a decision on the form
+  #   Then I should see an error message
+
+  scenario "Officer completes form incorrectly" do
+    visit new_officer_landing_application_decision_path(landing_application_id: @first_application_id)
+    when_i_fail_to_enter_a_decision_on_the_form
+    then_i_should_see_an_error_message
+  end
+
+  def then_i_should_see_an_error_message
+    expect(page).to have_content("Select either 'Approve' or 'Deny'")
+  end
+
+  def when_i_fail_to_enter_a_decision_on_the_form
+    click_button("Save and continue")
+  end
+
+  def and_i_should_see_my_decision
+    page.find_by_id("application-#{@first_application_id}", text: "Approved")
+  end
+
+  def then_i_should_be_redirected_to_application_list_page
+    expect(current_path).to eq("/officer/landing-applications")
+  end
+
+  def when_i_complete_the_form
+    page.choose("Approve")
+    click_button("Save and continue")
+  end
+
+  def when_i_select_make_a_decision
+    click_link("Make a decision", match: :first)
+  end
+
+  def then_i_should_see_the_decision_page
+    expect(page).to have_content("Do you approve this application for landing?")
+  end
+end
diff --git a/spec/features/officer/view_landing_applications_spec.rb b/spec/features/officer/view_landing_applications_spec.rb
index d6bb1efa..7f47de64 100644
--- a/spec/features/officer/view_landing_applications_spec.rb
+++ b/spec/features/officer/view_landing_applications_spec.rb
@@ -42,10 +42,4 @@ def should_see_list_of_applications
       expect(page).to have_content(landing_application.departure_date)
     end
   end
-
-  def create_applications
-    FactoryBot.create(:landing_application, pilot_name: "Jane", application_submitted_at: Time.new(2022))
-    FactoryBot.create(:landing_application, pilot_name: "Fred", application_submitted_at: Time.new(2023))
-    FactoryBot.create(:landing_application, pilot_name: "Sam", application_submitted_at: Time.new(2024))
-  end
 end
diff --git a/spec/forms/assessment_decision_form_spec.rb b/spec/forms/assessment_decision_form_spec.rb
new file mode 100644
index 00000000..97a08186
--- /dev/null
+++ b/spec/forms/assessment_decision_form_spec.rb
@@ -0,0 +1,36 @@
+RSpec.describe AssessmentDecisionForm do
+  describe "it validates presence of application_decision" do
+    context "when application_decision is missing" do
+      let(:form) { AssessmentDecisionForm.new(application_decision: nil) }
+
+      it "should flag an error" do
+        form.valid?
+
+        aggregate_failures do
+          expect(form.errors).to include(:application_decision)
+          expect(form.errors.full_messages.join).to match("Select either 'Approve' or 'Deny'")
+        end
+      end
+    end
+
+    context "when application_decision is present" do
+      let(:form) { AssessmentDecisionForm.new(application_decision: "approved") }
+
+      it "should NOT flag an error" do
+        form.valid?
+
+        expect(form.errors).to_not include(:application_decision)
+      end
+    end
+
+    context "when application_decision is present with an incorrect value" do
+      let(:form) { AssessmentDecisionForm.new(application_decision: "something else") }
+
+      it "should flag an error" do
+        form.valid?
+
+        expect(form.errors).to include(:application_decision)
+      end
+    end
+  end
+end
diff --git a/spec/models/landing_application_spec.rb b/spec/models/landing_application_spec.rb
new file mode 100644
index 00000000..cf9bfa43
--- /dev/null
+++ b/spec/models/landing_application_spec.rb
@@ -0,0 +1,13 @@
+RSpec.describe LandingApplication do
+  describe "belongs_to *assessor* association" do
+    let(:assessor) { FactoryBot.create(:user) }
+
+    it "has an #assessor association" do
+      landing_application = FactoryBot.create(:landing_application, assessor: assessor)
+
+      landing_application.assessor.reload
+
+      expect(landing_application.assessor.id).to eq(assessor.id)
+    end
+  end
+end
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
new file mode 100644
index 00000000..991c44ab
--- /dev/null
+++ b/spec/models/user_spec.rb
@@ -0,0 +1,17 @@
+RSpec.describe User do
+  describe "has_many *assessed_applications* association" do
+    it "has a #assessed_application association" do
+      user = FactoryBot.create(:user)
+
+      application = FactoryBot.create(:landing_application, assessor: user)
+
+      user.assessed_applications = [application]
+
+      user.save!
+
+      user.reload
+
+      expect(user.assessed_applications.first).to eq(application)
+    end
+  end
+end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index 92cf1f49..3a7d68f7 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -101,3 +101,9 @@
   # as the one that triggered the failure.
   Kernel.srand config.seed
 end
+
+def create_applications
+  FactoryBot.create(:landing_application, pilot_name: "Jane", application_submitted_at: Time.new(2022), assessor_id: nil)
+  FactoryBot.create(:landing_application, pilot_name: "Fred", application_submitted_at: Time.new(2023), assessor_id: nil)
+  FactoryBot.create(:landing_application, pilot_name: "Sam", application_submitted_at: Time.new(2024), assessor_id: nil)
+end