park it in public, chain it up, lock it up, make it a pain to steal. the huge majority of bike thefts are opportunistic, and light single cylinder bikes and anything remotely off road based is much more nickable in the school holidays when the scroats are bored and have time on their hands. one thing you can do is fit a tracker on the bike, hidden away somewhere. theyre available online using mobile phone technology and are ridiculously cheap, under 20 quid. i know it can all be a faff, but that empty feeling in the pit of your stomach when you look at the space where your bike was once parked is an experience youd rather not have more than once.