Maybe this won't come to a surprise to many but I have just found to my cost that you can't trust a 10mm cable lock (such as sold for a tenner by Wilko in my case) to keep your bike safe even in the most public of places. I parked my bike among several others in a designated bike stand in a busy shopping precinct, and since it was the middle of the day and plenty of people around I had not taken my heavy D-lock (as it is about 1/6 the weight of the whole bike!) and instead used a 10mm Wilko cable lock, plus another skinnier cable lock to protect the second wheel as it has a QR mount. I came back 20 minutes later to find both cable locks neatly sliced in two and no bike. The police tell me that although there are two CCTV cameras nearby both were looking the other way at the time so they have no leads to go on. I'd not thought people would be going around with bolt cutters in hand in broad daylight but obviously I was wrong! As you can imagine I'm kicking myself for thinking I could safely save a kilo+ of weight on my bike by using a lighter lock. It does make me wonder though, if a cable lock is no good in a public place like that, where is it good for? Maybe I could get a refund on the lock as being not fit for the purpose it was sold for? It was definitely sold as a bike lock and not just an accessories lock. My only consolation is that it will cost me about £70 less to replace the bike than it originally cost (mainly due to Wiggle discounting it to make way for next year's model).