International Olympic Committee president Jacques Rogge insists the decision on whether Christine Ohuruogu should be allowed to compete in Beijing next year can only be made in Britain.

The 23-year-old took gold in the 400metres at the World Championships in Osaka last week, just days after completing a suspension for missing three out-of-competition drugs tests.

Ohuruogu was allowed to compete in Japan under UK Athletics rules, yet is banned from future Olympic participation by British Olympic Association regulations. Her appeal against that decision is due to be heard next month.

And Rogge, in London for a sponsorship extension signing ceremony with electronics giants Panasonic, made it clear whatever was decided by the BOA would be good enough for the IOC.

He said: "My view is very simple - this is a matter for the British Olympic Association."

Ohuruogu has never tested positive for any banned substance but after missing three tests was handed an Olympic life ban under a rule system BOA chief Colin Moynihan has already hinted may soon be amended.

Rogge was convinced the IOC's tough stance on doping was already paying dividends by improving the Games' global credibility.

He said: "The fight against doping is our number one priority. In Osaka we have taken excellent measures to tighten up the fight against doping and I am happy to say they are extremely credible."

The Belgian, who competed as a yachtsman in three Olympics before succeeding Juan Antonio Samaranch as IOC president in 2001, was convinced there would be no problems with media access in Beijing despite the Chinese government's strict controls on information.

He said: "I can reassure you there will be no problems for media people in Beijing. We have been assured by the Chinese Government that a new law has been passed to allow media people to move freely."

Panasonic president Fumio Ohtsubo refused to reveal how much the sponsorship deal, which extends the company's tie-in with the Olympics to 2016, was worth to the IOC.

But Rogge, speaking at Westminster's historic Mansion House , insisted the IOC would never allow the Olympics to be controlled by the demands of cash-rich advertisers.

He said: "The Olympics stands out form a lot of sports competitions because they are very 'clean' games and we are very committed to that. Another example is Wimbledon. You see very little advertising there.

"That is the way we should keep it and our partners are very happy with that."

Lord Sebastian Coe welcomed Panasonic's commitment ahead of the 2012 Games in London. The organising committee chairman said: "We are excited that Panasonic are making a sizeable contribution to the Games in London."