Not to be put off I had a look this morning - not being able to see where said bulb was to be located I removed the heater control panel as per the guide.
Sod's law it was the one on the back right hand side

so after much twisting of heater controls I managed to insert the bulb into it's holder, then realised if wasn't quite seated properly as the heat control mechanism was catching when rotated

second attempt managed to insert it correctly

. Then put the heater control panel back together 4 the test and the Bas*ard bulb had blown/broken in the process
Not wanting to repeat the exercise I stuck my hand up the footwell panel and found it easy to remove again (once I knew where to look/feel).
Decided it would be easier to remove same bulb from ashtray compartment, fit that in the heater controls, re-build and then replace the ashtray one another day (2x screws and lift out the ashtray to unclip the bulb). Alas that one's blown aswell - really should have checked before removing
A few phone calls to some friendly dealers and I managed to locate 1 in stock in York, which will hopefully be delivered and fitted to heaters tomorrow

Got to wait for the second one to come from BMW UK.
I've also had to order fillister head screws and the little black caps that are missing from the trim panels following installation of the stereo - why do so many people think it's acceptable to half a job
