An update for those inquiring minds interested in the saga.
I had another call from the company this afternoon, a bloke left a message to ring him back, so I did. Apparently "one of your vans hit one of our insured fleet cars and just drove off." I pointed out that wasn't true, and that I would vigorously defend my statement of innocence. "In that case we'll report it and go down that route." When I pointed out he said they already had informed the Police so the was no alternative he said they'd filled in an accident report form but not submitted it I basically said carry on then mate. Apparently it happened at 06:45 and the car was a Peugeot 207 which has quite a bit of rear end damage. Yet there's not a (new) mark on my van.
I rang my insurance co when I got home and they were very helpful. They've put a note on the file but not raised a claim so that my premium will remain unaffected until/unless the other companies insurance contact them. They thanked me for letting them know, and commented that it all sounded very strange.
Then I rang West Mids Police non-emergency line. Another very helpful sole at the other end pointed out that it hasn't been reported as yet, and if it was reported now they'll do nothing as a) it's more than 24 hours since the incident and b) no one was injured. So they'd advise the person reporting to contact their insurance and that would be that as far as the Police were concerned. She went on to say that it all sounded very fishy, questions such as why ring you and not the police and or the insurance? Why wait 36 hours to do anything at all? Why ring me again instead of reporting it? She commented that you'd have to be "a complete fool" to try and drive off in a big white van with your company name, phone numbers and registration on display. "Especially when I can see that you're fully insured and the vehicle is taxed and MOT'd."
She advised me that I should drop into a Police station tomorrow, report the non-accident, fill in a form and get a log number. As I was only given the full details today, I have 24 hours in which to report the matter. She said that as far as Police involvement goes I will then be completely in the clear. She also said that it would look good with the insurance company that I had taken all reasonable steps to report and photgraph the vehicle.
So I'll visit the local constabulary tomorrow and do the paperwork. Then sit back and see what if anything hapens.