An excellent article on the Branches Park (and Hexton Manor) Speed Trials appears in the Spring 2017 edition of the VSCC Bulletin and is well worth reading. In the final event held at Branches Park on the 21st February 1931, M F L Falkner won the 850cc Class with his supercharged 847cc Midget with a time of 24.00 seconds. FTD was made by C S Cockerell's 418cc Velocette which covered the 550 yard course in 19.5 seconds.
I walked past it many times on my way home from school, for lunch, in the 1950's. It was parked outside the Stamford Arms in Bowdon, Cheshire, where presunably the owner was resting. And I lusted after it even then; all those gauges and knobs to twiddle!