I rent out a vehicle via an agency. I turned down a booking, and the agent found another vehicle for the customer. I got a notification of a message having arrived re my booking, and discovered that I am party to the full conversation between the vehicle owner and the customer. This includes the customer's passport and driving licence details, proof of address, dates they'll be hiring the vehicle (so I know their house will be likely vacant), along with details from the vehicle owner about location of the vehicle, how to deactivate its immobiliser, and their address and other contact details.
There is a clause in the contract between vehicle owner and agency referring to the Data Protection Act, and a further clause regarding confidentiality, and the fact that personal information will not be shared for any other reason than to process the booking.
I feel that some authority needs to know about this, and I feel that other owners of vehicles, and potential customers, should know that their personal information isn't being kept personal. I don't want to use the agency any more, and think that others might make the same decision, but only if someone tells them it's happened. My information hasn't been shared, as far as I know, but how would I know?
What do I do, legally?
Thank you