Watch the moment this man realises he's sitting next to the 669 children he saved during WWII.

RIP, Sir Winton.

Sir Nicholas Winton is a remarkable man. Before the Second World War, he rescued 669 children who otherwise would have been sent to a Nazi concentration camp.

He found them homes. He gave them a chance to rebuild their lives.

This touching video takes place 50 years later when Nicholas Winton is 79 years old.

Now he is 105-years-old, but back in December 1938 the former stockbroker from Hampstead visited Prague to see what was happening to refugees there. It was just before the outbreak of World War 2, and many Jewish people were displaced after the Nazi invasion of Czech Sudentenland in October 1938.

Winton, seeing how many people needed help, started organising evacuations of children on the Czech Kindertransport train.

But he didn’t stop there. He applied for permits from the immigration office in the UK for the children, advertised for fosters homes in the newspapers, and worked on getting children out of the country right up until WWII broke out in September 1939.

Once the war was underway, many of these children’s family members were interned in Nazi concentration camps, and murdered.

But thanks to Winton, these 669 children were able to live.

Today, they call themselves “Nicky’s children”.

UPDATE: Sir Nicholas Winton unfortunately passed away this week aged 106. UK Prime Minister David Cameron tweeted: “We must never forget Sir Nicholas Winton’s humanity in saving so many children from the Holocaust.”