Similar thing happened to me at Prescott Adrian. Parked on the grass facing slightly down hill and when it came to reversing back up to the tarmac the rear end crabbed sideways towards the car parked next door. Nailbiting but luckily it just gripped in time.

How do you manage 27mpg? I got 16 mpg on the last tank full and thats driving like Mother Teresa. OK there's a bit more power but not that much to account for the difference.