"A major study by Play England, part of the National Children's Bureau, found that half of all children have been stopped from climbing trees, 21 per cent have been banned from playing conkers and 17 per cent have been told they cannot take part in games of tag or chase. Some parents are going to such extreme lengths to protect their children from danger that they have even said no to hide-and-seek."
'Children are not being allowed many of the freedoms that were taken for granted when we were children,' said Adrian Voce, director of Play England. 'They are not enjoying the opportunities to play outside that most people would have thought of as normal when they were growing up."
Thanks to Bob Stein for spotting this article from the Guardian.