Originally Posted by cris

We passed this also, way after the incident.
No people about likely after the Ambulance had been
There was a single police car next to it and poss a BMW IIRC

Very glad to hear the driver & passenger are OK

I travel between London and Leicester a lot and use the A43 weekly there are a fair few incidents along there it's a deceptively quick road and lots of people drive quick down there.
Doesn't surprise me a nob in a BMW cutting someone off was involved.
5'er says it was a diesel 1 series

(for the record i am not implying any wrongdoing by the S1 driver)