David Cameron has said every effort will be made to ensure mistakes such as last night's Olympic flag mix-up never happen again.
The Prime Minister said the error in which the South Korean flag was wrongly shown instead of sworn enemy North Korea's at a football game was "an honest mistake" for which an apology has been issued.
It happened in Glasgow and to use a Scottish sporting analogy, it was a bit like walking into Celtic Park wearing a Rangers shirt.
After the flag of North Korean was confused with that of South Korea at an Olympic football game, we ask: How well do you know your flags?
North Korea football coach Gun Sin Ui is demanding answers after his nation's flag was confused with that of South Korea.