Hmm interesting result. Perhaps the plod didn't tell the truth when passing on the details of the incident.
Thanks for the update.

I know it's been a while but just read similar post on fullfat and it reminded me of this thread

Alistair wrote:

Don't get me started on lane hogs

I had a 14 month long episode before being found not guilty by a high court judge on appeal - the judge effectively explained to the nice police officer that he was a knob.....

Mine was a dual carriageway (70 limit) in heavy snow - police car in the outside doing 35 - having caught him up, I sat on the inside behind him for a mile or so, until we started going up hill & he slowed down - I maintained my speed & passed him on the inside - then the blue lights came on

By the time my summons came through - it ws too late for the Police to consider a charge against their driver for hogging lane 2 - funny that

Magistrates just agreed with the Police - High Court judge almost laughed at their explanation for hogging lane 1 in a Focus, overturned, awarded me full costs & ridiculed the police driver. Their reason was that they were trying to keep the lane usable by driving in it - I was in a FFRR with winter tyres.

There is no offence of undertaking - there are multiple conflicting rules in the highway code.

The crucial factor turned out to be whether you change lane in order to gain an advantage - maintaining a speed and just carrying on tipped the balance in my favour.

QUOTE^^^^
A while ago I was driving along the A14 on a Sunday morning, clear road and doing 70 cruise engaged. Ahead I could see two patrol cars parked in a layby. I checked my speed and continued. After passing them I checked my mirror and saw the two Volvo T5s pulling out. They caught me very quickly and the first one sat behind me so close that I couldn't see the bonnet in the mirror. The second one sat outside him in the right hand lane in formation. I checked my speed again and continued. They held their positions for 3 miles, so close that had I braked the one behind me would have hit me. I didn't flinch, just got more and more angry. After 3 miles the outside car shot past and the one behind me pulled out and followed him. They pulled away at high speed, well over 70 and with no lights or sirens.
^^^^^
I would be tempted to drop speed to 30-40 mph max until they got bored.

I find that randomly lifting off the accelerator, waiting til they are forced to slow down with you then accelerating back to the speed limit and repeating until they either overtake or pull well back, works with tailgaters like that.