Nice one chaps, I've eventually gone outside to the car and sorted most of the radio
problem.
I've swapped the wires around as suggested and now have radio with ingition off.
I've purchased the autoleads ariel booster too, but can't see where the wire connects to though. It says socket 5 on the ISO connector but I can't figure that one out as a lot of them are blanked off the other side or have no wires running the other side. It probably says what wire is what in the car's user manual I guess but I'm buggered if I can remember where I've put it!!!
As you can tell, it's been a very very long time since I last changed a car radio and I'm sure that was a lot simpler then too, just replacing a VAG suppplied SONY with an Alpine that simply involved swapping the fuse over in the socket on the back of the HU.