Thanks for the responses. Like I said I wasn't sure if I was being independent enough.
The insurance company know it was reported and they were provided with the incident number.
Despite optimism I may have harboured about a prosecution for failing to stop, the pessimist inside me suspected a driving course was the likely outcome and I wanted to make sure the driver didn't hide their actions from the insurers. What I hadn't expected was to have to fight the police to actually take action and then seemingly bugger it up.
I'lI see what can be done through the chain of command in the police.
As to my bruising, no there isn't a picture, but that was always a side issue. I suspect I will need some surgery on that hip this year for other reasons, so the discomfort from the hit was "lost" in the other stuff going on in it. My main concern was the driver's attitude. There was clearly no gap and as any driver who has hit a wing mirror knows, the sound is bloody loud in the car. - A point acknowledged by the PCs whom came to my house. So the driver must have known something had happened. It was obvious they didn't hit the lorry, which left one alternative, me. Some mea culpa at the time would have gone a long way, but they chose to drive off.
It sounds petty, but I think I will try to reclaim from the insurance company the £3 the MIB search cost me. Who knows, they might pay up and take it from the driver's policy?