Apparently the network engineers were reviewing the box in Willow Crescent (which is a mess inside and not locked) and decided to disconnect my broadband by inserting a 50dB attenuator. This usually means that basic TV reception is OK but broadband, on demand and so forth don't work (anything requiring uplink or return path). When they do this they don't tell you, just wait for you to log a fault. This is the second time it's happened to me. The engineer was friendly but had no equipment for measuring noise levels, so he changed a couple of components (isolator and splitter) just in case that might help. I have called 151 and expressed concern. In the meantime my broadband is working. Thanks Tim