This has been something I’ve been watching for some time. The demographic that has been the mainstay of typical UK classic car show exhibitors and favoring all those classic 50s-60s, and run of the mill 70s types, is starting to depart and a lot of their vehicles do not have appeal for younger generations. Meaning prices are going to fall regardless of other economic factors.
I think there's also another factor happening. People are seeing the potential end of internal combustion engines combined with the rising cost of petrol and deciding now is not the best time to invest in cars that can already cost £100+ to fill up