I’d heard of the German ruling, but hadn’t realised it meant that editing with a commercial COI, violating the bright-line rule, could be a legal hazard in the EU, violating the Unfair Commercial Practices Directive. In Germany your competitors may be able to sue you for it, and in Britain you could be prosecuted. That’s as well as the media hanging you and your client out to dry.
(The Signpost article claims with no justification that the ruling “complicates” the issue of COI editing, rather than making it much simpler, i.e. damn well listen to us and don’t do it. Some PR people may not like it, but that’s rather a different thing.)