For an expensive bike, might be worth getting one of these... I know someone who had a £1200 bike and the police recovered it in the same condition from some council house down the road.
Well worth every penny. Could turn up "With the boys" and deal out your own justice too.
there was a bike out side well lane police station in rockferry it was closed but the bike was outside unlocked what I found a bit strange because it was a nice one with disk brakes and stuff but not locked up.....carnt be sure if it was yours because don't remember the colour but might be worth asking if they took it in or have cctv