Not much info to go on there bluebird. How are you distributing the signal to different rooms? Scart, HDMI, RF,? Do you have a splitter system with built in signal booster? Are you using a youview box? did talk talk engineers set up the system for you? I would think that 3 tvs from one box or source is stretching it a bit, and may be compromising signal strength, particularly to the tv furthest away from the signal source. Modern tvs display connection lost messages when signal is weak or corrupted.