Infuriating! My hubby had one of our teenage sons' bike stolen outside Clapham South station the other Monday - it was secured to the bike rack with one of those flexible bike locks which, it seems, are too easy to cut through, even in broad daylight outside a busy tube station and on a busy road junction! Two days later he borrowed our second son's bike which was stolen from the same place, with the same type of lock on it, also in broad daylight.... I can only assume someone is watching and/or saunters along daily to inspect the rich pickings which are available and relatively easy to nick, and helps themselves - so be warned and/or get a better bike lock than we had, everyone. Police not interested except to issue a crime number, which they did very efficiently on both occasions. Now I'm going to look on Gumtree for our two bikes... thanks for the tip, Denwand - wish I'd seen it a couple of weeks ago!