Hornimans Adventure Playground in west London is a joyous cauldron of noise and activity. At first glance it's chaos. But look more closely and you'll see a mentor helping with homework, a playworker giving a guitar lesson and another at the centre of a noisy game as the playground goat looks on. It's a successful example of frontline playwork. Yet it mirrors many of the challenges facing playworkers today. The playground, run...