Re: Did he get a ticket?
Emergency lights on the back of police and traffic officers in the UK are highly directional. If you're behind them they're really bright but move off the centre line and they fade quickly.
Presumably this is by design to limit distraction to other lanes - unfortunately are highway wombles seem to like skewing their cars at an angle behind broken down vehicles. On a couple of occasions I've come round a slow left bend and it's like there are no lights on the back, move over to the next lane and it's like Blackpool illuminations.