Anger over 2012 Wembley 'backtrack'
London organisers are struggling to persuade badminton and rhythmic gymnastics to sign up to Wembley because of the travelling time from the athletes' village in east London.
The sports were due to be held much closer to the Olympic Park in a temporary arena near the O2.
Asked if 2012 had gone back on their pledge that athletes would compete - and not commute - at the Games, International Gymnastics Federation secretary general Andre Gueisbuhler told the BBC: "Yes. I always said it was about the athletes' experience.
It was originally hoped that a deal would be struck about Wembley at this week's International Olympic Committee executive board meeting in Lausanne. But both badminton and gymnastics chiefs are not happy and are unlikely to make a decision for another two months.
2012 officials are offering to put up athletes in hotels near to Wembley during competitions. They are also working on plans which they say would cut travel time from the village to around 45 minutes.
In an interview with BBC London, Gueisbuhler stressed that talks with London organisers were going well and he praised the initiatives.
But he added: "You know how much time you need from the Olympic village to Wembley. This is almost mission impossible and it can take one hour and 15 minutes or one hour and 45 minutes to get there and we can't have that.
"We will have to insist that an Olympic lane is made on the North Circular road. We realise that the public of London will perhaps not be happy but at the end of the day, athletes must be at the centre of all we do. "
London Mayor Boris Johnson has been keen to reduce the number of Olympic lanes but he has also been pushing hard for the move to Wembley in order to save paying £40million for the temporary venue at the O2.
Gueisbuhler said he recognised the economic arguments for the change.
"I understand that £40 million is a lot of money for a temporary venue. But on the other hand, London has made a promise to the whole world and we were very happy to support the London bid because we were happy that everything was in one cluster and rhythmic gymnastics was close to the 02," he said.
"It's talking to each other that you find a solution - not just by saying we move them out and they have to accept. At the moment, we are having very positive and friendly talks."