Theresa May has now signed a letter to trigger Article 50, the start of the official process to leave the EU.
Kent Boy To Get British Empire Medal
Teenage fundraiser, Dartford's Jonjo Heuerman, who has raised over a quarter of a million pounds to help beat cancer, will be presented with his British Empire Medal later.
Jonjo, who was awarded a 'gong' in the 2016 New Year's Honours, for his fundraising for the Bobby Moore Fund for Cancer Research UK, will receive his BEM at Penshurst Place.
Jonjo said he was looking forward to the presentation.
"I don't feel nervous, I'm really looking forward to it, especially wearing the waistcoat which will make it extra special," he said.
His mum Donna said the whole family was looking forward to seeing Jonjo recognised for all his hard work.
She said: "Jonjo is pretty laid back about it where as I'm fussing over him looking right and saying the right thing!"
Jonjo will also be attending a garden party at Buckingham Palace on May 24.
13 at the time of the award, Jonjo was the youngest person to receive the BEM in 2016 and one of the youngest ever to be given the honour.
Jonjo started his football-themed fundraising walks five years ago and has raised £255,000 for the Bobby Moore Fund for Cancer Research UK,
Jonjo was inspired to start raising money after his beloved nan Lyn died of bowel cancer in February 2009 aged just 60.
As a passionate West Ham and England fan, he was aware his footballing hero Bobby Moore had died of bowel cancer and decided to do all his fundraising for in honour of Bobby and his nan.
Over the years Jonjo has walked and cycled thousands of miles all over Britain.
Along the way he has attracted celebrity support from Steven Gerrard, Cilla Black, and West Ham vice-chairman, Baroness Karren Brady.
In April this year, Jonjo, accompanied by Donna and a support team, cycled and walked 450-miles from Germany to Wembley Stadium carrying a replica of the Jules Rimet Trophy.
Last year, along with Donna and dad Gary, Jonjo cycled and walked 800 miles, in a challenge that linked all 20 clubs in The Barclays Premiership.
Jonjo has more ambitious plans for the rest of 2016, to celebrate the 50th anniversary of England's victory in the 1966 World Cup.
They include a 32-nation junior world cup, a 1966-themed world cup banquet and a charity dog walk.
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