Steve
I am not sure that the Brighton Speed Trials were Britain's first motor sport event.

I think that research will show that there was a competitive speed event at Bexhill in 1902.

http://www.discoverbexhill.com/bexhillmotorracing.php

Like Brighton , the event took place along the sea front.

Andy G
1999 +8 , Indigo Blue.
Ex-John McKecknie/Mike Duncan 1955 +4 racer.