As mentioned here, my Pentium II-400 got fried by an ocuk power supply. As they say, however: Every cloud has a silver lining. With a dead computer, I could finally persuade my girlfriend that some long-overdue upgrades were necessary.
I don’t know if there’s something in particular about Overclockers.co.uk, but we’ve not had any good experiences with their power supplies. We’ve had two power supplies from ocuk, and they’ve both gone horribly wrong, and fried a whole shedload of hardware.