well that's the good thing - i typed my postcode into the website and the closest cache it brought up was less than 0.1 of a mile away! there are literally hundreds within a 5 mile radius. i'm guessing this applies to everywhere else in the uk (world, even) too. go to geocaching.com and enter a postcode (no registration needed). you'd be surprised how many are all around you and you didn't even realise.
oh, and the ankle turned a nice shade of purple in the night. lovely!