Thanks for the additional info; I'm familiar with the history. My
point is that - for whatever reason - the CIPR guidelines are stricter
than Wikipedia's own, and we need to be mindful of that.
Given that this court judgment is based on EU law, it could potentially have quite far-reaching consequences for the legal status of COI editing in Wikipedia.
Wikimedia Germany have commissioned a legal opinion from an expert. Could I suggest Wikimedia UK do the same? While the underlying EU Directive applies in both countries, there may be differences in national implementation.
Andreas