Someone should should stake out the front of Regency and survey the people taking their cars in to find out the circumstances about the defect eg. who defected it, where it was defected, what was the driver doing to get pulled over in the first place, what is the defect etc etc. This way an overall picture could be drawn as to what is happening. No doubt there would be cars that should have been defected but I'm sure there are ones that probably shouldn't have eg Cheeky's.
If the survey was done off the Regency premises then I can't see there would be a problem. Maybe handing people some sort of flyer, with a list of questions and a return email address or PO Box on it could be given to people as they come out. This info could be used in conjuction with the stuff Steve is collecting in the other Regency thread.
The suggestion might be pie in the sky stuff but it would be interesting to do.....unfortunately I don't have the time to do it but someone might.