No insurance details were swapped. It was on a single-file bridge with a pull in bit so we couldn't just block the bridge so I stopped at the other end of the bridge and they drove off slowly in the other direction, I waited for them to turn round and come back but they didn't, well I didn't wait that long, a few minutes most then pissed off home. I couldn't wait much longer where I was as it's a pull-in bit for traffic waiting to get on the bridge. I hope he didnt take my number plate down and accuse me of not stopping.