I mentioned it before and now it's happened again. Heading down towards the QEII Bridge on the M25, a police car came down the sliproad, pulled in front of the traffic and sat in the middle lane holding the traffic back. Now, you might think it'd be normal for the traffic to slow down to 70 when there's a cop car car around and behave nicely - but this one was doing only 50 and both coppers had an arm out the window waving everyone back...

After about a mile, they just upped sticks and zipped off into the distance.