Whilst recently parking I reversed to better align the car and came to a sudden halt. I thought I had hit something, but had not.

The gearbox was stuck in reverse; I was unable to select neutral or any other gear.

After waiting about an hour for rescue (engine off) I thought I would check again - and the problem had disappeared. I have since driven for about a week with no recurrence.

Have you had other similar reports? Any thoughts as to what happened or advice?