British Olympic chief Lord Moynihan has warned that badminton and rhythmic gymnastics will demand guarantees over Olympic lanes if they are to be persuaded to be based at Wembley Arena for London 2012.

The Olympic Board have agreed a proposal to base the two sports at Wembley rather than build a temporary venue at north Greenwich, but only if they can get the approval from the sports' international federations.

Moynihan, chairman of the British Olympic Association, said badminton and gymnastics would not suffer the same problems as boxing - who rejected the same move - over travel times from the Olympic Park in east London.

But he said the sports would need guarantees that special lanes reserved for Olympic traffic would be in place to speed journeys to Wembley. A decision on where exactly the lanes would run in the city has yet to be taken.

Moynihan said: "It's very different to boxing where athletes would have had to travel in the morning for a weigh-in and then again in the evening for the fights - it would have meant four hours a day travelling.

"The journey can be done in an hour with Olympic lanes - and these lanes are clearly an issue.

"The sports will want some guarantees on travel times and that's why we strongly welcome that this proposal must be subject to the international federations' approval."

Officials from gymnastics will be shown the proposals - which would save London 2012 organisers around £20million - this week and badminton next week.

The Olympic Board also confirmed, following a meeting today, that shooting will be based at the Royal Artillery Barracks in Woolwich and not at a back-up venue in Barking.

Moynihan added: "That uncertainty is now over and shooting will be at an iconic venue, so as far as the BOA is concerned it has been a very good day.

"We know there must be a balance between value for money and the athlete experience, and we are making sure that athletes are at the heart of the London Games."

Barking had also been lined up as a possible alternative venue for the two sports as well as a back-up venue for shooting.

Now it has been left without any sports, and the board will try to compensate by recommending the borough of Barking "as a suitable location for training venues and other operations in 2012".

If the federations give the thumbs-up to the Wembley plan, this will be presented to the IOC co-ordination commission in November, and to the IOC executive board for approval in December.