The annual iTunes Festival (now renamed as the Apple Music Festival) has been announced for ten nights in September. This is now the 9th year that the festival has run, and the 7th time it has been at the Roundhouse in Camden, London. For some reason it seems to have been reduced from a whole month of concerts down to 10 days. But to make up for it, they have got One Direction performing this year.
I spent a few years living in London and managed to get some of the free tickets. It's well worth applying for tickets if you're a UK resident. There is a pretty good chance you'll get something and you'll receive two free tickets to a great concert in a fantastic venue. Good luck!
If you can't get any tickets, everything is broadcast live via iTunes.