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@@ -26,7 +26,7 @@
 restrictions.
 
 By way of example, we've taken two overlapping breakdowns of
-geography, the [British Isles](https://en.wikipedia.org/wiki/Terminology_of_the_British_Isles) and the British Islands and created
+geography, the [British Isles](https://upload.wikimedia.org/wikipedia/commons/2/28/British_Isles_Euler_diagram_15.svg) and the British Islands and created
 simple datasets about the populations of the various parts.
 
 ![An Euler diagram with an overview of the terminology (public domain, TWCarlson, via Wikipedia)](https://en.wikipedia.org/wiki/Terminology_of_the_British_Isles#/media/File:British_Isles_Euler_diagram_15.svg)