Unmarked Police Car - M6 Northbound Junction 18

First outing with my new Nexar dashcam that I bought from the US. An unmarked Police car came flying up behind me and pulled in front of me with blues flashing. Thought he was pulling me over but luckily it swerved across all lanes to come off at the junction. M6 northbound, junction 18, 22/05/2021.