Good question Kenny.
I have struggled with this the past few years since changing for a new lcd tv.
You wont get a digital picture until 2010 when the local transmitter is changed. As for council TV, I found it hit and miss and ended up with a range of caravan type aerials that are now in the bin.
I even bought one of those portable satelite units but thats pants as well.
I have passed plenty of boats with good TV pictures but I have gave up for the time being. I am going to try a domestic aerial soon with the new TV and will let you know how I get on.
Hopefully someone here has cracked it and I would be delighted to find out what they done.