Prime Ministers of the United Kingdom of Great Britain and Northern Ireland
1945-1955: Clement Attlee(Labour)
1955-1963: Anthony Eden(Conservative)
1963-1965: Harold Macmillan(Conservative)
1965-1974: Harold Wilson(Labour)
1974-1980: Roy Jenkins(Labour)
1980-1981: Michael Foot(Labour)
1981-1987: Geoffrey Howe(Conservative)
1987-1995: Michael Heseltine(Conservative)
1995-1998: David Owen(Social Democratic)
1998-2002: Paddy Ashdown(Liberal)
2002-2010: Charles Kennedy(Social Democratic)
2010-2019: Nick Clegg(Liberal)
2019-present: Jeremy Corbyn(Labour)
Ok I'll have a shot
1. Attlee gains a large majority than 5 in 1950. Either the UK doesn't enter the Korean War or has send less men.
2. Eden leads the Tories back to power due to the UK becoming tired of Labour dominance
3. Macmillan was Eden's successor and became PM by "buggins turn". Brought down by a combination of Profumo and Tories seen as out of date
4. Wilson seen as dynamic leader. No devaluation in '67. Leads UK into Europe in 1969. Wins second election in '70 and retires in '74 due to onset of dementia.
5. Jenkins continues reforms of trade unions and moves into more "social democratic" centre of politics. Winter of Discontent leads to slender majority in '79. Jenkins faces leadership challenge and loses
6. Foot lasts less than a year in Downing Street. IRA attacks and rise of militancy causes Government to lose confidence vote.
7 Howe is seen as "the band-aid" PM. He opens talks with Ireland leading to Anglo-Irish Agreement in 1983 and ceasefire in 1984. Wins second majority in' 84
8. Heseltine's dynamic leadership begins to chafe with some hard-liners. 1992 election results in majority of 19 which slowly whittles away over next three years.
In 1981 following the fallout of Foot's loss. David Owen led 23 MP's out of Labour and formed the SDP. Heseltine's leadership led to 15 MP's leaving the Tories in '92 to form the Liberals. Talks between the two led to the Limehouse Declaration of 1993 where both parties stated that if either party won an election they would support each other in Parliament and create a "rotating premiership". Both Labour and Tories scoff but combination of disillusionment with old two party system combined with "spin campaign" led by SDP's Tony Blair assisted by Liberal's Peter Mandelson and ex Daily Mirror journalist Alistair Campbell" led to SDP winning largest number of seats.
Owen's tenure was seen as a "pilot" He signed up to the Euro and forced China to ensure Hong Kong's democracy
Ashdown's period was dominated by the "War On Terror". On 11th December 2000 New York, Los Angeles and Washington were hit by nuclear bombs. Al-Queda claimed responsibility. UK and US invaded Afghanistan and assassinated Bin Laden.
Kennedy took over and focused more on domestic issues. Economic woes and crime dominated his time in No 10. He died in 2010 due to cirrhosis.
Clegg was regarded as the last chance for "rotational leadership". His first tenure was fairly successful with inflation and interest rates were kept fairly low. Led "stay" campaign to victory in 2013 Euro Referendum. Economic crisis of 2017 rocked government. Disillusion with rotation led to Labour victory in 2019.