Hi all
Thanks for your replies.
The wiring near the lamp turned out to be the problem. Almost certainly disturbed by me when cleaning the car
The bullet connecter was ok and had power to it, so it was the crimped connector not far from the lamp. Once reconnected, I happened to have some heat shrink to seal and Bob's your uncle! I should be safe to make an appointment for MOT next week.
Thanks again everyone for your helpful and encouraging replies.
David Stuart
Mogdavid