Well, best of luck - you more or less know what you're doing regarding build. You'll at least know very quickly if it is or it isn't.
You could ask for a replacement PSU - as this would rule this out too. Reason for this is if you get your replacement CPU and have the same problem you would then be looking hard at the PSU and motherboard as the problem. You could 'statistically' rule the PSU out via OcUK's error.
Thanks mate. I’ve taken a leap of faith and ordered a replacement CPU from the same amazon seller, as it was the only place I could get it tomorrow at a similar price.
I’m going to test this tomorrow before I bring up the issues with OCUK as at least then I’ll know whether any of the components they supplied are at fault.