Parents gathering outside Chisenhale Primary School in Bow say they were given little notice of the "pop-up playground" being removed.The play space is part of the safer streets scheme which allows only parents of schoolchildren, immediate residents and blue badge holders to drive in the area at school drop-off times.Last week, Tower Hamlets Council contractors arrived on Thursday morning to find children climbing on top of the barricades in protest and the space was left intact.To the cheer of protesters, one child lay down on a skateboard before the workers gave up trying to dismantle the planters - a key feature of the safety zone - said parent and campaigner Sarah Gibbons.As well as being a play space, the brightly coloured oasis is used for community events."