International Olympic Committee watchdogs have confirmed they will not take any action against London after bid leaders withdrew three incentives packages announced as part of their campaign to host the 2012 Games.

The IOC?s ethics commission will however write to all five cities competing to host the 2012 Olympics to remind them of bidding rules.

IOC communications director Giselle Davies said: ?This issue is now officially closed. Because London have now withdrawn the charters, it no longer is part of the ethics commission?s work.

?There will be a follow-up to all the candidate cities in terms of a letter.?

The letter is understood to remind the cities ? Paris, New York, Madrid and Moscow are the others ? about certain rules, including the fact that IOC members? pictures should not be used in bid presentations.

London announced the incentives last week ? three charters contained dozens of promises of what the city would provide, amounting to a cost of #15 million.

The hasty rethink followed a statement from IOC president Jacques Rogge, who questioned the wisdom of such packages without approval and also made it clear he does not want a ?bidding war? between the five cities.

Meanwhile, London 2012 yesterday unveiled their latest bid ambassadors including cricket legends Sir Vivian Richards and Kapil Dev; Luol Deng, Britain?s 6ft 8in Chicago Bulls rookie and former Australia rugby union captain Nick Farr-Jones.