Former Liberal Democrat leader Sir Menzies Campbell has announced he will stand down as an MP at the next general election, due in May 2015.Sir Menzies, or Ming as he is widely known, said he had written to Deputy Prime Minister Nick Clegg to inform him of his decision.
He has served as MP for North East Fife since 1987 and was leader of the Lib Dems from 2006-07.
Sir Menzies said it had been "an enormous privilege" to serve as an MP.
During his career representing his "wonderful" Scottish constituency, he said: "My wife and I have made many friends and have been supported by constituents of all political persuasions and none.
"It is always a regret to begin the process of retiring from the House of Commons but I believe now is the time to start."