Well today I had a blonde moment. I decided on a smashing parking space, reversed in completely ignoring the grassy knoll behind. Bump.
Bugger.
Everything looked okay. Apart from when we got home, and the exhaust sounded like it was blowing.
Bugger again.
I've booked it in for an oil and filter change next week so they're going to have a look for me.
Saves me laying on my back for another 3 hours on cold concrete!