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.
More top news
Police are appealing for witnesses after a crash involving a car and three pedestrians in Islington.
Five rugby league legends were immortalised in bronze today outside Wembley Stadium.
Four people have been bailed after a three-year-old girl was shot in the stomach with an air riffle while she played in a park.