Peter.
Assuming the tyres match each other in regards to brand, pressure, condition etc. as Gareth suggests, the problem is likely to be too much toe-in, which will be revealed by extreme wear of the outer shoulder of the right tyre. You may even find the shoulder has been completely scrubbed off while the majority of the flat surface is unworn. If so, your car is dangerous and should be repaired without delay, as the problem will very rapidly worsen.
You should first get the steering and suspension checked for wear, and then get the tracking adjusted. Usually only the front toe-in needs to be done, but it is possible the rear also is mis-aligned if the car has been crashed.