Jaegermonster wrote (see)

You should get youself one of these.

I've got one of these, just can't remember how to take it off.

KK - Don't worry about the lakes. I'm relatively local to the lakes and have left my car in just about every layby or carpark in the Lakes Iincluding the pay and display carparks) without ever seeing signs of a break in. It does happen but is not as common as some papers make out. Make nothing visible inside your car, lock in your boot. Don't leave anything like maps, papers or anything as idiots will break in for a newspaper even though the ignorant b'stards probably can't read. Stay away from Barrow.

I'll be leaving my car for 9 days from next week. I think that shows confidence! Of course, with all the cars I've owned they've probably felt sorry for me.

I would say break ins in the walking areas are not common although they undoubtably happen from time to time.  From my own experience, i have walked and MTB'd all over the England, Scotland and Wales for the past 15 years or so and i have never had a problem.  I often leave my car for days on end when wild camping.  As previously mentioned, the sensible thing to do is to make it plain that there is nothing worth nicking inside.  I do remember one occasion though when I was in Glyncorryg ponds in South Wales, spotting my car from the last descent whilst I was still a few hundred feet up with its boot and rear passenger door wide open thinking some scrote had broken in.  When I got back to the car though I realised that in my hurry to get up into the hills i had "forgotten to lock up". Amazingly nothing had been taken even though there was a high end Terra Nova tent, walking gear, ipod and various bits of mountain biking stuff on in full view.

Someone was certainly looking after me that day and i always double check now just to be sure.