It may be a good idea now a days to install a onboard video camera, so that your journey is recorded and you could use the evidence to defend yourself against a corrupt officer who doesn't like your face and wants to issue you a FPN.
I've been doing that for years. I recommend it.
I was once pulled over by a copper for 'undertaking'. I wasn't. In fact, he pulled in from the middle lane right in front of me without looking, or signalling for that matter.
When he noticed my camera he sent me on my way, advising me to be 'more careful' in future. No apology, though.
I sometimes wish he hadn't seen it and prosecuted me. I'd have enjoyed my day in court. I had a clear recording of him pulling in without looking or signalling.
