Me again.
Having just had a look at my own pictures again I'm begining to wonder if there is a decoder fault and this fault is turning up much earlier on on the line as you can't quite turn the colour off completely. Is it okay to simply unplug all the leads to the decoder to check and there should be an okay mono picture. I seem to remember Mikey Bennett's article on the Pye Hybrids stating so.
I'll try again!
Tas
PS Time to watch the footie now though!