Baron | William Cecil, 1st Baron Burghley | baron | Charles Lennox, 2nd Duke of Richmond | Sacha Baron Cohen | Joseph Lister, 1st Baron Lister | Joey Baron | Robert Baden-Powell, 1st Baron Baden-Powell | Henry Brougham, 1st Baron Brougham and Vaux | Robert Devereux, 2nd Earl of Essex | Hugh Grosvenor, 2nd Duke of Westminster | Guy Carleton, 1st Baron Dorchester | Edward Harley, 2nd Earl of Oxford and Earl Mortimer | 2nd United States Congress | Michigan's 2nd congressional district | 2nd | William Petty, 2nd Earl of Shelburne | William Lamb, 2nd Viscount Melbourne | Hugh Percy, 2nd Duke of Northumberland | William Wallace, Baron Wallace of Saltaire | William Tyssen-Amherst, 1st Baron Amherst of Hackney | James Mackay, Baron Mackay of Clashfern | Hercules Robinson, 1st Baron Rosmead | George Villiers, 2nd Duke of Buckingham | George Brydges Rodney, 1st Baron Rodney | Beechcraft Baron | Thomas Seymour, 1st Baron Seymour of Sudeley | Thomas Denman, 1st Baron Denman | Stuart Rendel, 1st Baron Rendel | Norman Foster, Baron Foster of Thames Bank |
When Harold Macmillan became Prime Minister in January 1957, Mancroft was appointed Parliamentary Secretary to the Minister of Defence, Duncan Sandys, a post he held until June the same year, and was then Minister without Portfolio from 1957 to 1958.