there've been at least two botched software changes, resulting in long outages and successively poorer page design, there was a noticeable drop off in active users each time, the last one in particular, some bits had no activity for long periods
without users, the ad revenue will have declined sharply, though anyone capable will have been ad blocking it for ages as they became ridiculously obtrusive at one point
there's been near-zero moderation for a long time, presumably a cost reduction, i'd guess the final nail in the coffin was the online safety act https://www.gov.uk/government/publications/online-safety-act-explainer/online-safety-act-explainer
with the cost of compliance/risk of penalties, and the lack of revenue, no surprise that they chose to shut it down
I think the bottom line was that it wasn't worth the expense or faff for about 50 active forum members left, as there would be no advertising revenue and no Click-throughs to the main website.
Thanks both - that makes sense.
Always a shame to see these little communities die although at least there are alternatives and CC's always treated me well

I assume you're both refugees so welcome to the forum!