Longest distance without stopping

[Elpenor]

Motorway from Dover, M20? Join the M25 junction, go round clockwise, join the M1 from the M25, and head north. Join the A1M and keep going north. The first roundabout I can recall is north of Sunderland.

Traffic might be the only issue.

I think there’s a roundabout by Berwick, but not sure I’ve driven north on the entire of the of the A1

I think there’s an argument that zig zagging is permissible providing there are no repeated road so Dover - M20 - M25 - M4 - M5 - M42 - A42 - M1 - M62 - M6 - A74M - M74 - looping around / through Glasgow on motorways then finishing just before Dunblane might be the longest route. Must find the time to measure this on google maps.

 

[DownwardDog]

Not without stopping for fuel.

Diesel VW Golf with two 45L boat tanks on the back seats.