Lock it. Leave it. Lose it?

My hesitation with cycling around town shopping, apart from laziness, is the fact I hate leaving bikes in London locked up. If someone here wants to nick your bike here, they will nick it. I work in affluent Islington; home to media darlings, politicians, and other simliar Eloi. However, a local bobby told me that on the nearby Packington estate, the fire engines have police escorts. The reason for this is that 'yoofs' set off bin fires just to get the fire engines in the estate so that they can nick the 'jaws of death' off the back of the vehicles. These intimidating tools, used to cut people trapped out of smashed up cars, can snip through pretty much anything you can wrap around your trusty steed like a knife through butter. So a certain degree of judgment has to be employed. To me it's absolutely ridiculous to not use something you own for fear of it's theft or damage - what's the point of owning anything? My bike is insured (you can put it as an add on to your home insurance, but I'd advise against it as you probably don't want to lose the no claims benefit) on a stand alone policy at a cost of £10 a month through cycleguard. It specifies that I have to lock it with a silver graded lock or better if I leave it. The specification of lock obviously varies with the cost of the bike. I use a Magnum courier lock pictured here:-

If you use anything less sturdy, you might just as well leave it unlocked with a note wishing them enjoyment of your bike in the future. Or enjoyment of the small amount of crack they will receive from the fence they pass it to. NB if it does get nicked, wait a couple of hours, go on gumtree where it will pop up for sale, and visit with a large friend/ baseball bat *insert disclaimer*

A tip for locking: make sure the lock goes through the triangle of the frame. Not through the wheels or forks or saddle post or crank: they'll have it off in a second. Try and lock it as tight as you can so potential thieves can't wedge anything in to get it off. Park near a security camera. None of these things will ensure it won't be nicked, but do your best and get it insured. If it gets nicked, it gets nicked. I lock mine in Brompton 'parked mode' with the back wheel flipped under the frame. Here it is on Kings Road in Chelsea

The triangular part of the frame is a lot smaller on the Brompton, but I've done a close up so you can see it going through the triangle of the frame which is an unbroken steel barrier.

Even despite this, I'm never too comfortable leaving it for more than 20 mins. Goes without saying, don't lock it to a short post or even a post that's just over head height - they'll whip it over in no time. So, good luck, try and remember not to affix it to anything that isn't set in concrete, and console yourself with the fact that if it does get pinched, you can always claim and get a nice new one. 

That one you wish you'd got. The one with the carbon forks and the disc brakes. Because no-one will nick that one...