I have got my system running, the problem was with a badly designed PSU. One of the screw holes used to fix the PSU to the case directly lined up with the PSU's PCB, as the screw was turned it put pressure on the PCB causing it to flex (a tiny amount). The movement was enough to cause a power fluctuation too the MoBo. I stripped the system back down to component level powered it up on the bench and then rebuilt it out out the case. All went well, the OS install without problem but when the components were put back in the case the system failed to boot after much puzzling I noticed the problem with the position of the PSU's PCB and put two washers on the offending screw and the PC booted. Haly****in-lueier.
I purchased an alternative CPU from a different company but am still waiting for a refund from CaseTech despite being told it has been refunded three times it has not. I have have contacted my credit card company who are taking it up on my behalf and I am confident they will reclaim the funds.
Thanks for your support