On Thursday, 23 January 2020 21:22:58 UTC, NY wrote:

Even odder, the legal words say:

On the centre-line or off side of the vehicle (disregarding any sidecar forming part of a motor bicycle combination)

http://www.legislation.gov.uk/uksi/1...hedule/11/made

Makes it even more difficult to assess any useful details about the vehicle in front if you don't know whether in is in the middle or at the side.