Got the knockabout bike out late yesterday afternoon for my first ride in a couple of weeks only to find a flat front tyre and the brakes wouldn't release. Fixed the puncture yesterday which took a while as I struggled to find what had caused it (turned out to be just a fragment of a thorn) and by then I'd missed the window of opportunity to start the ride I had in mind so I cleaned the bike instead and had a look at the brakes. Tinkering didn't help so I came back to it today to strip and regrease the pivots and replace the rear pads. The rear pivots weren't too bad but the fronts were quite messy and showed the bike has had a hard winter. All is well again now though.