Norman,
Is it a fob operated key lock? , in which case is the fob battery dead .
Many fob operated locking systems are overcome because the manufacturers fit a mechanical override, this is placed under a removable cover on the door handle / lock fitting , and often it will be on the passenger door, Bentleys used to fit the to the boot lock so that you could open the boot and have access to the battery.
Most Recovery agencies carry a ballon kit which is placed in between the door and roof to hold it open whilst putting a rod in to flick the manual door opener, are you a member of the RAC , or do you have a family member who can be with you. It's the person who is the member, not the vehicle.
Hope these thoughts will stimulate some approach to resolving your problem.
Regards.