I was going to leave until the spring but the sun was out yesterday afternoon so I thought I would have an initial look at it,I got as far as unshipping the switch from the door (but not elec disconnected) when I luckily decided to do some googling.
Anyway turns out there is a pax window isolating switch on the drivers door control panel,cleverly positioned so that it is easy to knock and which disables both the passenger switch and the drivers switch.
Definitely a case of RTFM
