'Glastonbury for geeks' begins in London
2 September 2013 Last updated at 21:00 BST
A seven-day festival aimed at 18 to 30 year olds has arrived at the O2 in London with people from around the world joining in.
Campus Party, one of the biggest technology events in the world, is being held in the capital for the first time.
Ronan Dunne, chief executive of O2 UK, claims London is the epicentre for technology and innovation in Europe.
Presenter Suzi Perry also appears in this report by Alice Bhandhukravi.