Adrian, I'm glad you managed to come away from that with a near miss.
It's a bit unrelated but... I work on a lot of BNF (British Nuclear Fuel) sites and the are so hot (excuse the punn) on "near misses".
They learn from them and as a result you would not believe the tiny number of accidents they do actually have.
I don't think in your case it would actually change anything, but maybe a quiet word in his ear from his boss would let him know that his driving is being monitored.
Your call sir. But it does sound it was VERY close, I dread to think what the outcome would of been.
Good luck in whatever you decide to do.
Marky Mark