Will I be able to pick up foreign channels on Sky?

If the channels are broadcast on the Sky platform, then yes you will be able to pick these channels up with out any problems. If however you wish to pick up TV channels from other satellites like Hotbird and Astra 1 then theoretically yes. But you will need to retune your Sky receiver. You are better off getting a satellite receiver designed for picking up those other satellites and it is something that we do not get involved in.