I haven't managed to obtain the waveforms on the primary side MOSFETS, at the moment I am now winding a new transformer to produce a higher voltage on the secondary(to lower the duty cycle to see if that makes a difference), I will see if I can get the waveforms for next week, I had a feeling that both FETS might be on at the same time, but wasn't sure the reason behind it whether i was pushing the duty cycle to high or whether it was something to do with my feedback circuity.