Its not worth worrying about now mate. But i have to say theres 2 sides to every story, and im not saying your at fault but heres my take on it.

The first copper saw a brake light out whilst behind you. At a guess you were conscious of the fact they were following you making you a bit nervous, pull into an industrial estate, which in turn makes the coppers a bit suspicious of whats going on. Meanwhile your details are going through the system and you come up as clean, but they warn you of the brake light bulb. Job done, good coppers.

2nd copper might have been a nob, but i have to ask why he said you were driving like a prick? Surely there was some reason for him to say that?

The last pair of coppers, just doing their job? They see a group of cars congregating in a car park? They approach you to see whats happening. Yes they would have been better to not mention the section 59, but its a good tool for the police to target trouble makers and anti social behavouir, and as you were doing what many of them do, you were unfortunatly seen as 'potentials' for that catagory. So they were just doing their job.

No harm done. Nothing to worry about.