You are late by a few years
I used to live in Ealing and had my own darkroom several years ago.
Unfortunately, Ealing&Hampshire House Photography Club is almost all digital by now; at least that was the way it was going back then. You may want to attend one of their meetings on Thursday evenings between 8-10pm. They meet in Ealing Town Hall. There was this guy, Colin Ember, who was also a B&W darkroom man...he attended very infrequently though. Still, I think it's a good idea to pop in one evening and ask.
Cheers..