Sky+ in the UK when you’ve only got one satellite feed

So I recently moved flat and used to have Sky+ in the old flat. Sky+ (which is the same as MySky in NZ) needs two feeds from the satellite dish, so you need a dual LNB. I have one feed coming down from what I think is a communal dish on the roof of the building. I have actually quit Sky because it’s too expensive, but it’s still running till the end of the billing month so I Read post »