I have used this a couple of times now and it works brilliantly.

Coax between the tv and the hide-a-way location,
A Sky Eye
Globals TVLink Plus Kit.

Ding, IR Control for two sources over a spare piece of coax.

Total cost under 40.00, if you want to add more rooms simply at one of thier cheap TV amps to split the signal.

Don't think of it as controlling Sky or TV stuff, it is just IR passing, so anything can be controlled.