I have to admit I was stunned that anyone would take-off after that. I was not sure if that was more a "helicopter" thing, or more a fact of my machines flying public transport so subject to tighter rules.
I was also suprised that he thought it was OK not to find the van owner and let him know he had hit it - though the red paint will likely T-Cut out.
As posted, the event was reported to ATC at Redhill. That is a full, qualified ATC service and I would hope that ATC is required to report any collision happening on their watch. My understanding is that the Pilot is required to file a report with CAA (Mandetory Occurance Report?). So that's 2x reports. If you think it would be helpful for me to also report, to whom do you suggest?