they can not identify these UFO operators because they are not registered.
How will registration make any difference. In this case the 'drone' doesn't appear to have been found.
Will those who are involved in model a/c flying tell us the regulations they operate under.
The vast majority of 'model a/c flying' in the UK is done under BMFA guidance, laid out in CAP 658.
Please don't confuse the law-abiding people who are BMFA members with our nutter at Heathrow. They really are two separate groups...