Tom Lehrer did all the Chemical elements to Gilbert & Sullivan's A Modern Major General, here are all the British Prime Minister's in chronological order....

I am the very model of a political analyst,
I’ve studied all the theories, from fascism to communist.
I know all our Prime Ministers, the Tories, Whigs and socialists.
I’ve studied what they stood for, and not one them was federalist.

It all started with Walpole back in seventeen and twenty-one,
Then came Spencer Compton, who was known as Earl of Wilmington.
Then Harry Pelham had his turn then Pelham-Holles he did aspire,
he had but two years in the role and was replaced by Devonshire,

Then Pelham-Holles returned once more, to have himself another toot,
was followed by John Stuart, who was also known as Earl of Bute.
Next came Georgie Grenville, Rockingham stamp tax repealed,
Lords Chatham, Grafton, North, then sequel Rocky 2 revealed.

Then the Earl of Shelburne, and Bentinck Duke of Portland who,
was followed by the younger Pitt and Addington had his go too.
Then Pitt reprised the role again, Lord Grenville followed on this time,
Who was replaced by Bentinck whose second term was quite sublime.

There then came Spencer Perceval and then the Earl of Liverpool,
George Canning, Viscount Goderich, and Wellesley fresh from Waterloo.
Earl Grey he liked a cuppa, William Lamb was gone by supper,
Arthur Wellesley had another go, which he was quick to scupper.

Sir Robert Peel came in for a short time, but then he ceded when,
William Lamb came back for a much longer stint in number ten.
Then Peel returned with Bobbies, for the London streets so mean,
then John Russell, Edward Stanley and the Duke of Aberdeen.

Lord Palmerston was next to bat and he had his first go of two,
then back came our friend Stanley, and Palmerston ‘thout much ado.
Then Russell had another turn, been twenty years since his last one,
and Stanley came back for a third, as his last two had been such fun.

There then came Ben Disraeli, and Gladstone with his first of four,
Disraeli, Gladstone, Salisbury, Gladstone, Salisbury, Glad once more.
Next came the Earl of Rosebery, the final turn of Salisbury,
Balfour, then Campbell-Bannerman who ended up a deader man.

Along came Herbert Asquith, and Lloyd George who they say knew my dad,
Then Andrew Bonar Law and Baldwin who was thought to be quite mad.
Then Ramsay Mac and Baldwin then, to Ramsay Mac, Baldwin again,
To some chap waving papers who was known as Neville Chamberlain.

Winston Churchill came along to lead us through the second war,
then Atlee brought in lots of things, intended to relieve the poor.
Winnie, Eden, Supermac, Doug-Home gave his peerage back,
Wilson, Heath and Wilson, then Jim Callaghan took lots of flack.

Margaret Thatcher swept right in and life would never be the same,
an overbearing harridan, a tyrant by another name.
But in the end too far went she, and on her then her people turned,
John Major he replaced her, and just fiddled whist the Tories burned.

Then along came Tony Blair, who lied to us about Iraq,
then the dour Gordon Brown, to boom and bust we won’t go back.
These are all of the Premieres, who have held the reins of Britain,
and some were weak, and some were strong and some were quite hard-bitten.

Tum-tiddly-um-tum tum-tum!