While searching for something else I stumbled on a video of a UK FV race and interviews with drivers. Interesting specs, quite different from the aussies. 1300 engines with any compression, any camshaft, and dual carbs allowed with restrictor plates. About 90hp. BJ beams with discs in the front, swing axle and drums in the rear. Nice looking cars with multiple head cooling designs, bottom up and top down. Any 15x6 wheel, treaded tires (states dunlop but the 2015 regs show hoosiers) of specific size (spec tires). Space frame or monocoque. Most cars seem to be tubular space frame.
There is an A and B division. The only difference I can find is the "B" cars use the standard 009 distributor and the "A" cars can use an ECU type. Maybe something else...
The organization is "750 Motor Club": http://www.750mc.co.uk/formulae/formula-vee.htm
Interesting rear suspension in the video using zero roll but with two roll control shocks.
Video: https://www.youtube.com/watch?v=JPD52w_LsOo