Surrey Police have just called me to tell me they've found my Rockrider 8.1 abandoned in some woods.
I explained it was locked in my garage in Manchester.
I'd registered the frame number online (just shows it works!) and part of the number matched, but of course just the bit saying what type of bike rather than the unique identifier bit.
Sooooo, if you've lost a bike, then call Surrey Police and reclaim it.