Right, here's the problem, back in the year dot, about 1982. We had our gents and ladies toilets wired up at work with lighting and an extractor fan, no problems, it all worked well for many years. Note the use of "fan" in the singular. One large unit, built into the ceiling and inlet pipes from both toilet areas.
Rather than have sensing from the lighting circuit to start the fan, whoever wired it used a 1 gang 2 pole switch in each toilet area, 1 side of the switch turning on the lights and the other side applying power to the fan. There was no timed delay on the fan, it just ran while the lights were on.
Anyway, to the problem I have. One of the switches has failed and I seem to have the job of finding a replacement. What the heck is it called? Is there a special name? Am I missing something blatantly obvious? I've tried searching TLC's site, but they either don't stock such a thing or I'm missing something, a Google gave many results, but again nothing that made sense.
It looks exactly the same as a crossover switch that would be used as a mid point in a 2 way lighting system, but instead of crossing over there are just two 1 way switches in the one moulding.
Any one any idea what I should be searching for?