Jessica Ennis is to compete at the Sainsbury's Anniversary Games at the Olympic Park on 26-28 July, British Athletics have announced.
Sports Minister Hugh Robertson insisted he was "absolutely confident" that the London Marathon could be kept safe following events in Boston.
Sporting figures have reacted with horror to the scenes in Boston, where at least three people died in explosions at the Boston Marathon.
Race organisers say the London Marathon will go ahead despite two people being killed after three explosions at its Boston equivalent.
Boston Police has confirmed that two people have been killed and at least 23 injured following two explosions during Monday's marathon.
Holly Bleasdale believes she will benefit from the attention that will be elsewhere at this year's World Championships.
Birmingham will play host to the IPC Athletics Grand Prix Final in June.
Oscar Pistorius' family have encouraged the six-time Paralympic sprint champion to return to training to help "stabilise him emotionally".
Oscar Pistorius is ready to return to training but has no immediate plans to compete, according to his agent Peet van Zyl.
Usain Bolt fell just short of his 150 metres world mark as he opened his season with victory on Copacabana beach in Rio de Janeiro.
Oscar Pistorius' agent claims he would be welcomed back to certain athletics meetings when he decides to return.
Usain Bolt looks likely to race at the London Anniversary Games at the Olympic Stadium in July.