I just happened to spot from the top of a double decker a couple of days ago, a sad looking 10111 405 line antenna pointing groundwards, along with a X 405 line BBC antenna. They were on the rear of a single storey shop, with a two storey built since the end of 405 behind it. Even when 405 was active, I doubt the reception was that good, because just across the road and LOS was an 1850's 3 storey building.