Every so often, an event comes along that reminds us why we live in London. Tomorrow night at BFI Southbank, there are 2 of them. First up, at 6.20pm, the Institute’s Capital Tales strand presents 3 short documentaries about London before the 1960s – including ‘Free Cinema’ pioneers Karel Reisz and Tony Richardson’s fabulous peek into the seamy world of jazz clubs in ‘Momma Don’t Allow’ (above). Then, at 8.30pm, the Essential Experiments strand screens Samuel Beckett’s dialogue-free ‘Film’ starring Buster Keaton, along with a fistful of shorts exploring perception and paranoia. You don’t get that in the provinces.