Based on your account....
1) It's careless driving on your part.
2) The Citroen was also driving without due care and attention.
3) Won't be traffic police (or at least not traffic police on patrol)
4) If you were the police in the Citroen, would you fancy completing statements, a Notice of Intended Prosecution Form, prosecution file, a probable interview and a CPS meeting - especially since they'll know they had no business behaving like that?
5) The police acted poorly and contributed to your driving reaction.
6) It probably was police trying to enforce the speed limit but in a very unprofessional way.
7) I recommend you make some good notes NOW of the events including description of the car, description of the 'police' drivers, weather conditions, road conditions and everything that happened including how you felt by the poor Citroen driving, date and sign it and put it away. Should the worst happen, when you go to court, you have notes made while events were fresh in your memory that are probably better that the police notes - making your evidence of their driving compelling.

Enjoy Christmas and forget it, I'd bet dozens of mince pies that nothing will come of it!
Keith
