In video: Toddler has a tantrum while meeting the Queen 

The monarch remained relaxed and smiling.

Queen Elizabeth unveiled a national memorial honouring the armed forces and civilians who served their country during the two Gulf Wars and the conflict in Afghanistan.

There was a lighter moment to the day when before leaving the site the Queen received a posy from the Lunn family – Sergeant Mark Lunn, 29, who was awarded the Military Cross for his actions during a fire-fight in Basra, his wife Corporal Michelle Lunn, 26, and their two-year-old son Alfie.

Despite the toddler squirming in his mother’s arms and trying to grab the flowers held by the Queen, the monarch remained relaxed and smiling.

Mrs Lunn said later: “They’re so unpredictable children, we tried our best. He was fine up until a few minutes before the Queen arrived.”