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Have a look at this. You may need to separate the fan switching from the
light.

http://www.screwfix.com/app/sfd/sea/...w=timer+switch

B&Q also do two versions - look for 'Columbus' or similar name.

Cic.


I was in same situation as the OP recently & thought of same pneumatic
timer switch (wickes have them cheaper at 9.99!).
But I wasn't sure if you can still use them to break a more inductive load
like a fan motor rather than just a light?