• Labour Party, communism 1
• Lais, Admiral Alberto 1
• Langer, Colonel Gwido 1, 2, 3
• Lee, Captain Hugh 1
• Leon, Sir Herbert 1
• Lever, Mavis
  • Abwehr code broken 1, 2, 3
  • engagement and marriage 1, 2
  • German language background 1
  • Italian code broken 1, 2, 3
  • Matapan messages recalled 1
  • visits DK at home 1, 2
• • visits DK in hospital 1
• Lewin, Ronald 1
• listening stations 1
• Lobel, Professor Edgar 1, 2, 3
• Lobster Enigma 1, 2, 3
• ‘lobsters’ 1, 2, 3g