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Hamilton dedicated his recent win in Spain to the youngster, who has been told he has only days to live following a nine-month battle with Ewing’s sarcoma.
The world champion had been alerted to the youngster’s plight after he received a video message ahead of Sunday’s race in Barcelona.
At the time the total was at around £10,000, but the running total now stands at more than £110,000.
Mercedes then parked one of their cars at Harry’s home in Surrey on Monday before presenting him with Hamilton’s winning trophy from the race in Barcelona.
Harry’s parents, James and Charlotte, launched a JustGiving page to raise money for The Royal Marsden Cancer Charity on the morning of the Spanish Grand Prix on Sunday.
England cricketer Jos Buttler, former England footballer Gary Lineker, and grand slam tennis champion Novak Djokovic, are among a number of sporting stars to have spoken about Harry’s illness on social media.
“Thank you to everyone who has supported us nationally and around the world,” Harry’s father, James Shaw told Press Association Sport on Wednesday. “The response has been quite incredible.
“I am so proud that the video of Harry has been seen by so many people, who have had the opportunity to see our courageous little boy and how wonderful he is.
“We are going to keep pushing. We have no upper limit. We want to raise as much as we can to help the other little Harrys of the future.”