Bit more of an update on this. After fixing his switch pack he accidentally left the sun roof open and flooded the interior in a heavy down pour overnight. Switch pack now completely dead. Swopping it with mine has proved this is the case. Back to the dead door, we couldn't find any connectors or wiring issues and because he only had one working key, the becm, engine ecu and both keys have been sent to les at classic rides.
He has reported back with photos of water damage and burning.
Beyond repair so he has sourced another and refurbished that along with a new key for £310 iirc. All the bits came back yesterday and will be fitted tomorrow (saturday). Hopefully that will fix the dead door too.
Oh...missed a bit of the story out!
The plan,at les's request, was to drive the car to him and he would fix the issue with the door and sort another key while he waited and if he couldn't fix it quickly, my friend would catch a train back home and leave the car with him.
2 days before the trip however, my friend left his lights on all day at work so was greeted with a flat battery, key code lock out blah blah. Charged the battery and connected my nanocom and disabled the siren which kept going off but I couldn't enter the eka code, whether that was my incompetence with the nano or a fault with the becm, couldn't enter it via the door latch either, we don't know. So no driving to les and so it was removed and posted. Not ideal of course but at least we can rule out the becm as being the cause of the dead door and he will have two keys!
Used switch pack purchased off ebay which hasn't arrived yet.