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A 14 year old boy from Milton Keynes is going to Ten Downing Street today.
Mickey Collins, from Cosgrove, has run his own market stall along the Grand Union Canal since he was 11 years old. He sells canal memorabilia, like bookmarks and suncatchers, and also practical items for the canal boats, like mooring pins.
This evening's reception - which he is going to with his Dad, Martin - is to celebrate the success of Britain's small and medium sized businesses.
Mickey told Heart how he felt when the invitation came through:
"It took me a few times to read it through, because I just wasn't sure. It was just mind blowing really. It's really exciting and I can't wait until I go."
Mickey - who lives on a canal boat with his family and is thought to be the youngest member of the Federation of Small Businesses - raised most of the money himself to be able to set up his business, by doing chores for people who live nearby. He says there's a lot more to running it than just setting up the stall on Saturday morning.
"You have to have your public liability, you have to be registered with the tax office, you have to have a permit to be where you are. There are a lot of things to take in to consideration."
Although he also has dreams to become a vet when he's older, Mickey admits he would like to do more with his stall:
"I'd like to expand it further, maybe more stalls going around the country. I'd like to have quite a large business one day."