diff --git a/ch05.adoc b/ch05.adoc
index c8a8497b..9a6a0122 100644
--- a/ch05.adoc
+++ b/ch05.adoc
@@ -550,42 +550,42 @@ variables:
     crs:reference_ellipsoid_name = "Airy 1830" ;
     crs:prime_meridian_name = "Greenwich" ;
     crs:towgs84 = 375., -111., 431., 0., 0., 0., 0. ;
-    crs:crs_wkt = "COMPOUNDCRS ["OSGB 1936 / British National Grid + ODN",
-      PROJCRS ["OSGB 1936 / British National Grid",
-        GEODCRS ["OSGB 1936",
-          DATUM ["OSGB 1936",
-            ELLIPSOID ["Airy 1830", 6377563.396, 299.3249646,
-              LENGTHUNIT[“metre”,1.0]],
-            TOWGS84[375, -111, 431, 0, 0, 0, 0]
+    crs:crs_wkt = "COMPOUNDCRS["OSGB 1936 / British National Grid + ODN",
+      PROJCRS["OSGB 1936 / British National Grid",
+        BASEGEODCRS["OSGB 1936",
+          DATUM["OSGB 1936",
+            ELLIPSOID["Airy 1830", 6377563.396, 299.3249646,
+              LENGTHUNIT["metre",1.0]]
           ],
           PRIMEM ["Greenwich", 0],
           UNIT ["degree", 0.0174532925199433]
         ],
         CONVERSION["OSGB",
-        METHOD["Transverse Mercator",
-          PARAMETER["False easting", 400000, LENGTHUNIT[“metre”,1.0]],
-          PARAMETER["False northing", -100000, LENGTHUNIT[“metre”,1.0]],
+          METHOD["Transverse Mercator"],
+          PARAMETER["False easting", 400000, LENGTHUNIT["metre",1.0]],
+          PARAMETER["False northing", -100000, LENGTHUNIT["metre",1.0]],
           PARAMETER["Longitude of natural origin", -2.0,
-            ANGLEUNIT[“degree”,0.0174532925199433]],
+            ANGLEUNIT["degree",0.0174532925199433]],
           PARAMETER["Latitude of natural origin", 49.0,
-            ANGLEUNIT[“degree”,0.0174532925199433]],
+            ANGLEUNIT["degree",0.0174532925199433]],
           PARAMETER["Longitude of false origin", -7.556,
-            ANGLEUNIT[“degree”,0.0174532925199433]],
+            ANGLEUNIT["degree",0.0174532925199433]],
           PARAMETER["Latitude of false origin", 49.766,
-            ANGLEUNIT[“degree”,0.0174532925199433]],
-          PARAMETER["Scale factor at natural origin", 0.9996012717, SCALEUNIT[“Unity”,1.0]],
-          AUTHORITY["EPSG", "27700"]]
-       CS[Cartesian,2],
-         AXIS["easting (X)",east],
-         AXIS["northing (Y)",north],
-         LENGTHUNIT[“metre”, 1.0],
+            ANGLEUNIT["degree",0.0174532925199433]],
+          PARAMETER["Scale factor at natural origin", 0.9996012717, SCALEUNIT["Unity",1.0]]
+        ],
+        CS[Cartesian, 2],
+        AXIS["easting (X)",east],
+        AXIS["northing (Y)",north],
+        LENGTHUNIT["metre",1.0],
+        ID["EPSG",27700]
       ],
-      VERTCRS ["Newlyn",
-        VDATUM ["Ordnance Datum Newlyn", 2005],
-        AUTHORITY ["EPSG", "5701"]
+      VERTCRS["Newlyn",
+        VDATUM["Ordnance Datum Newlyn"],
         CS[vertical,1],
-          AXIS["gravity-related height (H)",up],
-          LENGTHUNIT[“metre”,1.0]
+        AXIS["gravity-related height (H)",up],
+        LENGTHUNIT["metre",1.0],
+        ID["EPSG",5701]
       ]
       ]" ;
   ...
diff --git a/history.adoc b/history.adoc
index bfca341c..90ecbbf7 100644
--- a/history.adoc
+++ b/history.adoc
@@ -7,6 +7,7 @@
 
 === Working version (most recent first)
 
+* {issues}566[Issue #566]: Fix invalid CRS WKT attribute in example 5.12.
 * {issues}367[Issue #367]: Remove the AMIP and GRIB columns from the standard name table format defined by Appendix B.
 * {issues}403[Issue #403]: Metadata to encode quantization properties
 * {issues}530[Issue #530]: Define "the most rapidly varying dimension", and use this phrase consistently with the clarification "(the last dimension in CDL order)".