Thanks for the replies.
Alistair, the Garmin automatically sets the time to that of the time zone it is in. The Dashcam doesn’t so video clips from it show British Summer Time. I have software called Dashcam Viewer which displays the camera image alongside its location on Google maps. The location at 13:00 hours shown by Dashcam Viewer is the same as that shown on Garmin’s Basecamp map at 14:00 hours European time.
Howard & Morganmike I’m inclined to pay up. The fine is trivial compared to the cost of the trip and I’ve better things to do with my time.