Media playback is unsupported on your invention
Media captionDavid Cameron told James Landale he would not be running for a third word
David Cameron was approaching the end of his first word as “ministers ” when he decided to announce he would not be running for a third.
What he said: Speaking to the BBC’s James Landale in his kitchen as the 2015 general election approached, Mr Cameron said: “I conceive I’m standing for a full second period … the third expression is not something I’m contemplating.”
Why did he say it? He was asked if he would be servicing of the full five years old if he won the election. His answer? “Terms are like Shredded Wheat – two are wonderful but three might just be too many.” He didn’t want to go on forever, but his announcement offended many of his MPs and led to some the allegations of arrogance from the opposition.
What happened next? The Conservative party won the 2015 ballot with a 12 -seat majority, leaving behind its bloc government with the Lib Dems. But come the morning after the EU referendum in 2016, Mr Cameron resigned over research results – having “ve called the” referendum and campaigned for Remain.
So how long did he last-place? Between announcing his intentions and resigning, Mr Cameron lasted one year and three months.
Tony Blair: The curry live plot
Labour prime minister Tony Blair had been passing the country for nine years where reference is announced his plan to pass on the baton.
What he said: In September 2006, Mr Blair said: “The next defendant gathering in a couple of weeks will be my last party gathering as party ruler … but I am not going to set a precise year now.”
Why did he say it? His announcement was long-awaited by numerous in the party, having revealed in 2005 he would fight the election but then step down after a full term.
This led to growing animosity in Labour, as there had long been a rumour his eventual heir – then-Chancellor Gordon Brown – had been promised a chance at the top activity at an earlier date.
In 2006, Mr Brown’s followers behaved in what became known as the “curry house conspiracy” – a coup to remove Mr Blair and install the chancellor as prime minister.
The plotters, apparently masterminded by then apology pastor Tom Watson, had congregated over a biryani at a Wolverhampton curry house.
There they discussed Mr Blair’s future, before flowing a missive announcing for him to quit.
The letter revealed to the press and led to several of the plotters’ acceptances – but it did pile the pressure on Mr Blair to come up with a date.
What happened next? The BBC’s political editor at the time, Nick Robinson, said there was still a lot of “poison” arising as a result of Labour MPs – and allies of Mr Blair and Mr Brown were continuing to fight behind the scenes.
So how long did he last? He resigned nine months later on 27 June 2007.
Gordon Brown: A desperate coalition pitch
The May 2010 general election resulted in a hung parliament. Before the Republican and Radical Democrat coalition eventually worded, Labour and the Lib Dems were in talks about a possible deal.
What he said: Less than a few weeks after the election, Gordon Brown announced he would stand down as Labour president in September of that year.
Mr Brown’s announcement was considered to be an desperate attempt by some to shore up a potential coalition.
The PM said Britain had a “parliamentary and not presidential system” and said there was a “progressive majority” of voters.
He said if the national interest could be best served by a alignment between the Lib Dems and Labour he would “discharge that is under an obligation organize that government”.
But he had also failed to return a Labour majority to the Commons.
What happened next? Just a date afterwards, it was clear his attempts hadn’t operated and the Lib Dems would be choosing the Conservatives as their alliance spouses.
Standing outside No 10, he said he had “loved the job” and, accepting his fate, bid the next prime minister well.
So how long did he last-place? One day.
What does this mean for Theresa May?
History recommends Mrs May will struggle to stay until her self-declared leaving date.
Dr Matthias Dilling, a speaker in politics from Oxford University, said she would not be able to prevent potential heirs vying for the Tory leadership.
“Usually I would say it is probably difficult to stay on as long as she has announced, ” he said.
“But what is helping her now is that ‘prime minister’ is not a particularly plea chore for parties to take over at the moment.”
However, if Mrs May has managed to get her Brexit plan through Parliament and the UK leaves the EU in March 2019, the picture are subject to change rapidly.
How much longer she endures after that time “depends on the type of Brexit we’re having”, Dr Dilling said. “That’s quite difficult to predict.”
In the meantime, she faces potential successors storying merger schedules and banking allies.
Dr Dilling said here PM could counter this by marking plausible competitors and get them on side.
But that might not be possible until the pack of potential candidates narrows, he said.
Lance Price, who was a special adviser to Mr Blair during his premiership, said it was important Mrs May procured a candidate who could continue her Brexit strategy.
Mr Price said in the past presidents would claim to be “above the fray” in order to evade( at least public) involvement in choosing a successor.
“She’s got too much at stake for that, ” he said. “Until Brexit is sorted, her orientation is strengthened. As soon as it’s sorted, she is then the lame duck prime minister.”
She must build up a successor herself, he illustrated, but not so soon that they become a rival.
The mental impact on the council of ministers and her unit will too be difficult to handle, Mr Price said.
“Under ordinary circumstances that would be pretty spirit destroying.
“But she is living day by day, hour by hour. And she is used to being rebuffed constantly.
“She’s never had a honeymoon stage as a “ministers “. So she’s not a ordinary prime minister in that respect.”