There were no human casualties during any of her patrols but, in 2012, she lost her leg and suffered chest burns after discovering a home-made bomb in Afghanistan and retired.

Lucca's owner, Gunnery Sergeant Chris Willingham, travelled to London with his pet to accept the medal.

He said: "Lucca is very intelligent, loyal and had an amazing drive for work as a search dog. She is the only reason I made it home to my family and I am fortunate to have served with her. Today, I do my best to keep her spoiled in her well-deserved retirement."