Okay ,so it didn't work in the barn circled black. I tried it in the garage to the left of the house and it worked spot in the way sri_130 stated. So I can only assume that it's not wired in to the same as the house.
We can get a very faint signal over at the barn with from the new router (the HomeHub is inside the house which is like 200 years old so the walls are made of horse shit and straw or something) so we might just sort a decent antenna for the garage and then we are good to go.
Cheers guys