Britain's Prime Minister David Cameron (R) and General Nicholas Houghton, Chief of the Defence Staff, listen to speeches during a reception at Guildhall following a memorial service to mark the end of Britain's combat operations in Afghanistan in central London.

Britain's Prime Minister David Cameron (R) and General Nicholas Houghton, Chief of the Defence Staff, chat during a reception at Guildhall following a memorial service to mark the end of Britain's combat operations in Afghanistan in central London.

Britain's Prince Harry speaks with armed forces personnel during a reception at Guildhall following a memorial service to mark the end of Britain's combat operations in Afghanistan in central London.

Britain's Prince Charles (L) speaks with armed forces personnel and families members during a reception at Guildhall following a memorial service to mark the end of Britain's combat operations in Afghanistan in central London.