At a certain junction in a town that shall remain nameless, two roads merge. One road becomes the left hand lane, the other becoming the right hand lane. The lane markings are a broken line throughout. After crossing a bridge, the road has an "off slip" to the left, so lane changes are frequent, and often badly signalled, if signalled at all. I am returning a loan "B" class to the dealer, where my "C" class has been in for a service. I am in the left hand lane. As I half expected, an Astra Van, directly alongside me, pulls across into my lane without indicating. I'm already covering the brake, so there is no exchange of paint. So far, so normal. White Van Man, driving as usual. Except.......... this van is marked "POLICE - DOGS" As it happens, we are both heading in the same direction. I ponder taking the registration number and having a "word in the shell-like" of the Traffic Sergeant, not being nasty, just to ensure that the driver concerned is made aware of the incident - to prevent a recurrence. As we reach an open road, the dog van signals me to stop, which I do. Surely the driver isn't going to criticise my driving... or worse... I stop the engine (Police find this reassuring - it means you are not going to drive off), put on hazard flashers, and open my window. The PC approaches. "I'm awfully sorry, I didn't see you" the PC says. "Are you ok?" I thank her for taking the time to apologise, assure her that there is no harm done, I'm not shaken, we all make mistakes, etc, and we go our separate ways. Full marks to her for taking the responsibility of her actions. If every PC I come across was as honest, fair, polite and upright, we'd have a Police Service to be proud of. I guess it's fortunate that I was in a "B" class, because the bonnet is a lot shorter!