It's done by a few people, but they're very busy; 95 per cent of crimes in the Hope Valley are from climbers' and walkers' cars. (No real surprise.)
The BMC says that you should "Always report break ins, even if you are not going to make any insurance claim, to Buxton control on 01298 72100, or alternatively to Crimestoppers on 0800 555111."
The BMC reiterates the guidance: always lock your car, and don't leave anything in it. Our extra guidance, make it plain that you're not hiding anything (put hatchback boot shelves down, for instance; leave gloveboxes open). We could add the advice given for years on uk.rec.climbing, which was to leave some women's knickers in the back. Failing that, a baby's nappy: you'd smell the crims for miles.