RRS remote locking stopped working

[Tyre Smoke]

Unlocked the sport today and drove it about 10 miles, went to lock it and nothing. Ahh, thinks I radio interference (had this before you see) and move to a different part of the car park. Still no joy.

When I got home, I tried the spare fob. Still nothing. Both fobs start the car and it drives fine. All fuses are intact.

Any ideas chaps?

Expensive trip to main dealer coming up?