PP, I use an automatic SCART switch box to resolve issues.
I bought it fairly recently, and I have cable tv box, DVD, VCR and Wii plugged into it (in that order of priority), with a single output to the TV (which only has one SCART socket, which is why I bought the switch).
There is also a direct connection from cable tv box to VCR, to allow recording from cable, but the connection into the switch of DVD and VCR allows DVD to VCR recording.
The TV also has the co-ax connection from our roof aerial that provides the 5 basic analog channels (for a few more years).
Cable is on TV channel 0, analog channels are 1-5 and all other devices are accessed via AV - the auto SCART switch only sends the signal of the device in use to the TV. It actually works better than I had hoped!
There is just so much cabling, though!
SD