Undermarked convoy on M4, what could it be?

[Nickbrapp]

Today on the m4 I was passed by a strange convy, all had strobes in the front grills red and blue, rear windows and lights, plus a standard police siren.

All where black except one,

There was a CLA250 shooting break, a previous gen E63 estate, a debadged E63 saloon, a grey Audi RS6 Avant, a black A6 saloon, a New shape 2x BMW X3 and a GLE63 AMG

All where in the outside lane and doing about 85mph around Newport

[Nickbrapp]

LarsG said:

Remainer Politician going on holiday to Cornwall that voted against his 70% Brexit constituency.

He was defo lost then as He was heading towards Swansea