Gambia has announced its withdrawal from the Commonwealth, barely six weeks before the Prince of Wales is due to open the grouping's biennial summit.
President Yahya Jammeh, a despot who seized power in the West African state almost 20 years ago, became the first leader to pull out of the Commonwealth unilaterally since President Robert Mugabe chose to withdraw Zimbabwe in 2003.
He claims to have personally discovered a cure for Aids and has been accused of widespread human rights abuses, notably by ordering a national campaign against "witches".
His Government announced that Gambia had "withdrawn its membership of the British Commonwealth and decided that the Gambia would never be a member of any neo-colonial institution and will never be a party to any institution that represents an extension of colonialism".
The sudden departure of one of the Commonwealth's African members is an unexpected blow on the eve of a summit due to be held in Sri Lanka on November 16. Unusually, the Queen will not attend; instead the gathering will be opened by Prince Charles who will be joined by about 50 heads of government.