We've got my sky at home in the lounge and in the weekend we bought a freview HD unit that has a DVD player built in, hard drive...etc... I'm not sure if this needs to run off the Sky Sattelite dish or if it can run from an ordinary UHF aerial - I will read the manual / instructions later today.
We plan to put this unit in the bedroom and set up our spare TV there, keeping my sky in the lounge.

The problem is we are in a town house (1 of 2) and on the roof there is only 1 sky dish and 1 UHF aerial and it looks like both have a 'splitter' on the sky dish and the UHF aerial - as there are cables running from the sky dish splitter to our house and next doors and from the UHF aerial there is a cable going to our place and next doors.
I've been told that if you split the signal it weakens it? so if this is correct that means we are not getting a full signal at our place?

This will be a problem because if the Freeview HD box we've just bought requires a Satellite dish then I'll have to put a splitter in the lounge (where both sattelite and UHF cables are) and run that to the bedroom - further weakening the signal, but if it only needs a UHF aerial we might be ok.

Our bedroom is behind the lounge & I will have to drill a hole in the wall for the cable to go through (old 1960's house)

my wife wants to ring sky and ask them, but if they come out to install a new dish / aerial they will charge us, so I thought I'd ask for advice in here.