Firstly; sorry for the necromancy.
Secondly; does anyone know what brand/model of stem the B52s have? Would really quite like one for my B52-in-disguise. I found a close approximation (a Sakae stem with a roller), but I don't think it's quite right. Looks nice, tho, so I can live with it.
Thirdly; here's my contribution to this rather old (but ace) thread; another Muddy Fox branded B52 frame:
It's got the seatstay-mounted U brake, the dual downtube bottle mounts, and had a mostly Exage Mountain groupset (apart from the bits replaced by the previous owner). The parts were so broken that I had to replace most of it - the only original components are the U brake, the front mech, the seat QR, and the headset.
Here's that stem I mentioned: