Front Cam confirms you are lane hogging. No excuse for the undertake but pot, kettle and black come to mind. Just because everyone else is in the right lane does not mean you have to stick with them.
Sorry forgot to say the video clip is reversed (thats the way the camera films).
I am in the outside lane when you see he changes lane then accelerates past about 4 or 5 cars at speed.
AG07 EBD: Dark Volvo S80 EXTREMELY dangerous driving on the M4, undertaking at 140-150mph! After seeing the acceleration I am certain this car has been modified and I doubt this driver has informed his insurance company which makes him even more dangerous!!!
Very good driving