Answer:
76
Past Prime Ministers
The Rt Hon Theresa May MP
The Rt Hon David Cameron
The Rt Hon Gordon Brown
The Rt Hon Tony Blair
The Rt Hon Sir John Major KG CH
Baroness Margaret Thatcher
James Callaghan
Harold Wilson
Sir Edward Heath
Harold Wilson
Sir Alec Douglas-Home
Harold Macmillan
Sir Anthony Eden
Sir Winston Churchill
Clement Attlee
Sir Winston Churchill
Neville Chamberlain
Stanley Baldwin
James Ramsay MacDonald
Stanley Baldwin
James Ramsay MacDonald
Stanley Baldwin
Andrew Bonar Law
David Lloyd George
Herbert Henry Asquith
Sir Henry Campbell-Bannerman
Arthur James Balfour
Robert Gascoyne-Cecil, 3rd Marquess of Salisbury
Archibald Primrose, 5th Earl of Rosebery
William Ewart Gladstone
Robert Gascoyne-Cecil, 3rd Marquess of Salisbury
William Ewart Gladstone
Robert Gascoyne-Cecil, 3rd Marquess of Salisbury
William Ewart Gladstone
Benjamin Disraeli, the Earl of Beaconsfield
William Ewart Gladstone
Benjamin Disraeli, the Earl of Beaconsfield
Edward Smith Stanley, 14th Earl of Derby
Lord John Russell, 1st Earl Russell
Henry John Temple, 3rd Viscount Palmerston
Edward Smith Stanley, 14th Earl of Derby
Henry John Temple, 3rd Viscount Palmerston
George Hamilton Gordon Earl of Aberdeen
Edward Smith Stanley, 14th Earl of Derby
Lord John Russell, 1st Earl Russell
Sir Robert Peel 2nd Baronet
William Lamb, 2nd Viscount Melbourne
Sir Robert Peel 2nd Baronet
Arthur Wellesley, 1st Duke of Wellington
William Lamb, 2nd Viscount Melbourne
Charles Grey, 2nd Earl Grey
Arthur Wellesley, 1st Duke of Wellington
Frederick Robinson, Viscount Goderich
George Canning
Robert Banks Jenkinson Earl of Liverpool
Spencer Perceval
William Cavendish-Bentinck Duke of Portland
William Wyndham Grenville, 1st Baron Grenville
William Pitt 'The Younger'
Henry Addington 1st Viscount Sidmouth
William Pitt 'The Younger'
William Cavendish-Bentinck Duke of Portland
William Petty, 2nd Earl of Shelburne
Charles Watson-Wentworth, 2nd Marquess of Rockingham
Lord Frederick North
Augustus Henry Fitzroy, 3rd Duke of Grafton
William Pitt 'The Elder', 1st Earl of Chatham
Charles Watson-Wentworth, 2nd Marquess of Rockingham
George Grenville
John Stuart, 3rd Earl of Bute
Thomas Pelham-Holles 1st Duke of Newcastle
William Cavendish Duke of Devonshire
Thomas Pelham-Holles 1st Duke of Newcastle
Henry Pelham
Spencer Compton, 1st Earl of Wilmington
Sir Robert Walpole
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