British Prime Minister David Cameron was caught on camera telling Queen Elizabeth on Tuesday that leaders of some "fantastically corrupt" countries, including Nigeria and Afghanistan, were due to attend his anti-corruption summit, Reuters reports.
Cameron will host an international anti-corruption summit on Thursday aimed at stepping up global action to combat corruption in all walks of life.
In a pooled video feed made available to the ITN broadcaster, Cameron was shown talking with the queen about the summit.
"We had a very successful cabinet meeting this morning, talking about our anti-corruption summit," Cameron said when the queen approached. "We have got the Nigerians - actually we have got some leaders of some fantastically corrupt countries coming to Britain."
Cameron went on: "Nigeria and Afghanistan - possibly two of the most corrupt countries in the world."
The queen, who generally steers clear of political comment, did not respond to Cameron's comment. But the Archbishop of Canterbury, Justin Welby, said: "But this particular president is actually not corrupt."
Nigeria's President Muhammadu Buhari and Afghan President Afghan President Ashraf Ghani, both of whom are due to attend the summit, acknowledge corruption in their countries and have pledged to clean it up.