During this era, speedway went through the biggest crowd "boom" in its history. Wembley, who ran league meetings every Thursday, had by far the biggest crowds. The average weekly attendances were around the 60,000 mark from 1946-1951, with one meeting of note, a London Cup match between Wembley and West Ham, drawing an estimated crowd of 85,000 with 20,000 locked outside, listening to a BBC radio commentary of the match via loudspeakers set up in the car park. Towards the mid-1950s speedway crowds fell away dramatically and Wembley's last season in 1956 saw average attendances of around the 15,000 mark.