1. MacArthur, General Douglas 1, 2, 3, 4n
  2. MacDonald, Malcolm 1
  3. MacDonald, Ramsay 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26
  4. Maclean, Donald 1
  5. Macmillan, Harold, 1st Earl of Stockton 1, 2, 3n, 4, 5, 6
  6. Macnaghten, Malcolm 1, 2
  7. MacVeigh, Lincoln 1
  8. Maisky, Ivan 1
  9. Malayan Emergency 1
  10. Mallalieu, J. P. W. 1, 2n
  11. Manhattan Project 1, 2
  12. Mao Zedong 1, 2, 3
  13. Margesson, David 1
  14. Marquand, Hilary 1
  15. Marsh, Captain 1
  16. Marshall, General George 1, 2, 3, 4, 5, 6, 7
  17. Marshall Plan (European Recovery Programme) 1, 2, 3, 4, 5, 6, 7, 8
  18. Martlets Society 1, 2
  19. Mary, Queen of England 1, 2
  20. Masterman, Sir John 1
  21. Mathew, Theobald 1
  23. Maude, Aylmer 1
  24. Maude, General Sir Stanley 1
  25. Maxton, James (‘Jimmy’) 1
  26. Maxwell Fyfe, Sir David, later 1st Earl of Kilmuir 1
  27. May, Alan Nunn 1
  28. May, Sir George 1
  29. Mayhew, Christopher 1, 2n, 3, 4, 5, 6n, 7n
  30. McCarthy, Senator Joseph 1
  31. McMahon, Senator Brien 1, 2
  32. McNeil, Hector 1, 2
  33. McNeil, Sheila 1
  34. Medley, Kathleen See Attlee, Kathleen
  35. Mikardo, Ian 1n, 2, 3, 4n, 5, 6
  36. Millar, The Revd Basil 1
  37. Millar, Edric 1, 2, 3, 4, 5, 6, 7, 8, 9, 10
  38. Millar, Olive See Willis, Olive
  39. Millar, Violet See Attlee, Violet
  40. Millar, Winifred 1
  41. Milverton, 1st Baron (Arthur Richards) 1
  42. Mogae, Festus 1n
  43. Molotov, Vyacheslav 1, 2, 3, 4, 5, 6, 7, 8
  44. Monckton, Sir Walter 1
  45. Money, Chiozza 1
  46. Monnet, Jean 1
  47. Montford Scheme 1
  48. Montgomery, Field Marshal Sir Bernard, 1st Viscount Montgomery of Alamein 1n, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11
  49. Moon, Sir Penderel 1, 2, 3
  50. Moran, 1st Baron (Charles Wilson) 1
  51. Morgan, Evan 1
  52. Morgan, Kenneth 1n
  53. Morley, John 1, 2
  54. Morris, William 1, 2
  55. Morrison, Herbert 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11n, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28n, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52n, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66
  56. Mosley, Sir Oswald 1, 2, 3
  57. Mott-Radclyffe, Charles 1
  58. Mountbatten, Admiral Lord Louis, Earl Mountbatten of Burma 1, 2, 3, 4, 5, 6, 7
  59. Mountbatten, Lieutenant Philip, later HRH Prince Philip, Duke of Edinburgh 1
  60. Moyle, Arthur 1
  61. Munich Conference 1, 2
  62. Murray, Sir Evelyn 1
  63. Muslim League 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14
  64. Mussolini, Benito (‘Il Duce’) 1, 2, 3, 4, 5, 6, 7, 8, 9
  65. Mutual Aid 1