Thanks for comments guys and JohnV6 for sorting the pictures - it was my first go at loading and a couple didn't make it as the resizing was rejected.
The plus 6 seems quite a bit wider than a Plus 4 in the flesh - my one has roadster wings so is wider than standard.
Alas the hood stayed up on the journey home - M25 on a drizzly Saturday with heavy traffic is not meant for Morgans!