We're just having a discussion regarding:- is it illegal to drive your car at night with the interior light on. I would be grateful for any info on this. I have Googled it and still confused. What are your thoughts.
Sorry, I'm wrong (after all these years...):
2) No vehicle shall be fitted with a lamp which is capable of showing any light to the rear, other than a red light, except–
(a)
amber light from a direction indicator or side marker lamp;
.