WARNING POSSIBLE MOT FAIL
I had my car serviced today by Len @ BHM and he asked me about the changes I had made. He tells me that when the fog lights are on you cannot see when the reversing lights are on and that this would be an MOT failure. Evidently the MOT requires the reversing lights to be visible.
Seems I will need to add a relay so that the fog lights go out when the reverse lights are on.