Apologies for this post, I put it in the wrong thread, what a tw,tAccording to my series 3 wiring diagram, one wire from the lamp (white) goes to fuse contact 7 and the other wire (white/blue) goes to the switch. The other wire from the switch (white/yellow) goes to what is described as switch, cold start thermostat. That seems to be the same on a series 2a. Not sure if that helps any.
Col
I had that very idea so I emailed said dealer and asked if they'd have any objections to me get the RAC to do an inspection? The response from them up to this point had been very prompt, since I asked this question which was two days ago I've heard nothing! So I'm guessing there best avoided!