Half your luck, Lloyd! I hope you have / had a productive day.
Thanks for the tip for the Pathe movies, which works a treat. There's quite a lot of Birmingham footage there, and quite a lot of bus footage, but sadly not much "Birmingham bus" footage
The Birmingham AEC 507 has fancy solid tyres with a tread! (They are solid aren't they?) Its "cab" looks a lot like that on the prototype FS.
I must admit my education is somewhat lacking as regards BCT, but I've been improving myself by viewing the many interesting posts and pictures on the Corporation Transport threads.