Slacklining is the use of webbing tensioned between two fixed anchor points to balance, walk and perform tricks. Slacklining is very accessible and pretty much anyone can have a go. Slacklines can be found relatively cheaply online, however there are ways to try out slacklining in London without buying your own. A great place to discover a bit more about the sport, meet people who do it, and find out where and when people are slacklining in London that you may be able to join is the Slacklining, London Facebook page. The slacklining community in London is very welcoming and open to new people joining the sport.
One point I’d like to make is that if you’re using trees as your anchors it’s important you make sure you protect them properly.