[trikey]

To discount macafees suggestion, Jack up the car and try and spin both wheels with the handbrake applied, if one turns it’s the wheel end that’s the issue.

To access the handbrake compensator it’s easier with the centre console out (try this first) it should let you see the issue.

If not you need to lift the carpet at the rear of the front seats to access the Tim cover over the top of the compensator, once the tin cover is removed you should be able to see the issue.