Think I may have worked out the problem, the grub on the regulator was almost all the way in.
Took the return off the bottom and with a cup underneath primed the pump and nothing came out, gave the grub a couple of turn out (anti clockwise)and it started squirting out on priming the pump, releasing the excess fuel
Lets hope this was the problem.
How do you set up a fuel reg thou! only with fuel guage? if so where do you take the measurements from? can do from the return off the reg but what about the feed?