Friday & Saturday are now sold-out for the Sainsbury's Anniversary Games. Tickets are still available for Sunday’s IPC I'national Challenge
The site allocating tickets for the London 2012 Anniversary Games is experiencing delays.
It comes after a similar system was criticised during the Olympics last summer, which meant people missed out on seeing the events that they wanted to.
However if you have already registered the 'Ticket Master' links and website are still working.
To try and get tickets, you must register. You can do this at British Athletics website, although it is experiencing problems at the moment.
On Sunday, Paralympic heroes Jonnie Peacock, Richard Whitehead, Mickey Bushell and Josie Pearson will take on some of the best athletes in the world in a one-day IPC International Challenge, fresh from competing at the IPC World Championships in Lyon.
Paralympic T44 100m champion, Jonnie Peacock said: "There’s a huge positive energy in the Stadium and it’s a bonus that it’s a super quick track. It holds great memories for me and it will be great to go back there nearly a year on and see what I’ve got to offer.”
All five British Olympic and 14 of the 16 Paralympic medallists have, so far, been confirmed to compete this summer at the Sainsbury’s Anniversary Games.
In the IAAF Diamond League, Jessica Ennis will double up in both the 100m hurdles and long jump, before being joined in Saturday afternoon’s event programme by double Olympic champion Mo Farah, who will run in the 3,000m, and Olympic long jump champion Greg Rutherford.
Tickets for the Anniversary Games go on sale on Friday but applicants MUST pre-register before midnighton Wednesday. @itvlondon
Click here to register.
Enfield-born Team GB high-jumper Robbie Grabarz will be taking part in the Anniversary Games.
British Athletics' Ed Warner says Oscar Pistorius is unlikely to be invited to the Anniversary Games.
Warner says it is nothing to do with guilt or innocence, but to avoid a "media circus".
Sainsbury's has been named as the sponsor of the British Anniversary Games in the Olympic Stadium in July.
The three-day event includes the British Athletics London Grand Prix and a one-off Paralympic event.
Tickets go on sale on Friday.