Heading for Dover from Slough this afternoon and on the M25 at the A3 junction a police vehicle joined from the slip road a little way in front of me, as you no doubt know it becomes 4 lanes again just after the junction so I moved into lane 1 with the police vehicle about 100 metres ahead of me but travelling slower than me, it was raining very hard and I was doing about 52-53 mph. In lane 2 there is a silver Yaris and this guy was just sitting there a couple of meters behind the police vehicle but not making any attempt to pass it. I gained on both vehicles and moved first into lane 2 then into lane 3 to pass them both and as I got 9/10ths of the way past the Yaris it accelerated up to level with the front of my unit then stayed there for a minute or so before moving into lane 1, at which point I moved into lane 2 and started to go past the Yaris again. I was almost past it for a second time when he again accelerated to level with me and stayed there. 
I decided I wasn’t going to play this game and as there was nothing behind me in lanes 2 and the police were about 100 metres behind in lane 1, I slowed to get back in behind the Yaris. At this point the Yaris also decreased speed and stayed level with the front of me. 
I think he was trying to stay in the spot with the least amount of spray. Once again I increased speed and once again so did the Yaris 
but this time he carried on until he was ahead of me, 
I gave him a moment to get ahead then moved into lane 1.
I looked in the mirror and saw the police vehicle move into lane 2 and increase its speed and as they came along side me the officer in the passenger seat look up, smiled and made sort of ‘Can you believe that pratt?’ type gestures. 
They then proceeded to attempt to stop the Yaris whose driver seemed to be oblivious to the fact. They were behind it with the lights going and headlights flashing, they pulled along side and gave him arm signals but it was over a mile before this guy realised what they wanted and pulled onto the shoulder. I moved into lane 2 to give them a wide berth as who knew what this guy would do next and I had visions of his door flying open. As I went past the officer climbing out of the vehicle gave me a smile and a little wave and headed towards the Yaris with a look of determination on his face.
Isn’t it nice when there is a police officer about when you want one? I was smiling about it all the way to Dover. 
