Just found this thread.. I've got a C35 enlarger for sale but it would be very expensive to ship it to the UK. The bulb that I have also is for 120v/60 hz. So I don't think this would work. The actual bulb for this model was called a MELLAMP55. Special size and thread as a normal house bulb would not fit the socket.. check out www.donsbulbs.com and see if they have any for the UK mains... the one's he lists for here in the States cost $55 EACH.