My 4/4 (two years earlier than your +4) has a micro-button under the dash approximately below the clock. Hold to make clock go forward. Easy in Spring +1 hr, in Autumn +11hrs (as you can't spool the clock backwards). I'd expect your car would be similar, but hey - it's a Morgan!
Thanks for that TT. Will go looking for that switch!
Disconnect the battery and wait until the clock on the car shows the same time as reality and quickly reconnect the battery.
That'll be plan B!
Cheers
