The South Road Race championships take place on a 14.5 mile road circuit starting and finishing at Upavon airfield this Sunday  23rd May commencing at 10:00 am. 
The main event is for seniors in the E/1/2/3 category who do 6 laps, but there are supporting races for 3/4 Cat, Juniors and Women who do 3 laps.
Entry is allowed on the line (just turn up and enter) according to the details on the BCF web site here,
Race details and start list here