I'VE JUST BEEN TOLD ABOUT A NEW POSTAL SCAM.
'UNDELIVERED PARCEL' cards are being posted through letterboxes claiming that a company called PDS or PDC (postal delivery Service/company) have been unable to deliver a parcel. There is a number to ring to reschedule delivery. DO NOT ring it as your phone bill will be charged £315 to a company in Belize.
If you get a card through your letterbox call the Royal Mail Fraud 02072396655 to report them.