Hi,
I also hate cables and have hidden mine in the wall, they are also fixed and not replaceable...
All you should need in the wall hidden are: a very good quality HDMI cable, Coax (if he wants freeview) and a power socket.
•The TV power cable will plug straight into wall behind and you can...
I've only recently noticed this but don't know if it's always been the case - I noticed it as the house does warm, but only eventually, so whilst I can't say for sure it wasn't always like this, I seriously doubt it as this system is now 5 years old.
My boiler is a Baxi Duotech 28HE Combi...
I have UFH downstairs and Rads upstairs. The CH out from the boiler goes through a Y Splitter and I then have a 2-port motorised valve on each CH circuit, one leads to the upstairs CH rads and is all controlled via one thermostat, the other goes downstairs where it meets the UFH manifold...