Just wondering if anyone else has had the same issue - bought a BJCM4 in May 2012, and within the first few months, the lock on one of the front wheels kept engaging by itself all the time (i.e. every time you push it back down, it pops back up within a minute or two). Bought through John Lewis, who organised a replacement wheel very quickly.
However it is now happening again - no way of telling if it is the other original wheel or the replacement wheel. Hopefully JL will send me a replacement again, but I just wanted to know if this has happened to other people? I'm considering contacting Kooltrade to point out that this seems to be a general fault, rather than a one-off dodgy fault, especially if others have experienced the same.