getting english tv

Hi All, wonder if anyone can help me.

We have a holiday property in the hills above bagni di lucca and would like to have satellite tv.

can anyone please tell me the co ordinates that the dish must be set to to get uk stations - and what stations might i hope to receive (its a sky box but without an up to date card since the digital switchover).

My second question is that i've noticed that some people seem to have their satellite dish attached to the roof tiles rather than the house wall (hadn't realized you could do this) - anyone know where I could buy a bracket for the roof as i think we might benefit from putting it there.

thanks in advance