What about our own round Britain relay? It is not beyond our collective wits to plot a map of any volunteers. Work out the most effective route and get us each to do a leg? I know the south east would probably have a convoy in some legs whereas my area might be me and a pal with a 1938 version. I could even go over on the ferry to Northern Ireland (I speak the lingo as I was born in NornIron!).
Now this just has to have potential.
Charities could be represented.

2022 Plus Four, 2023 Super Three, Range Rover Vogue SDV8 and Triking T3.