The Ride For Their Lives initiative will call on world leaders to make air pollution a political priority.
Once in Glasgow, the group will deliver letters to the political representatives of the COP.
When you live in Glasgow it’s hard to get excited about COP26 – Stephen McIlkenny
Teams from Great Ormond Street Hospital (GOSH), Evelina London Children’s Hospital, Bristol Royal Hospital for Children, Sheffield Children’s Hospital, Great North Children’s Hospital in Newcastle and the Royal Hospital for Children in Glasgow made their way to the Granary Square in London to cheers from family members and supporters.
One cyclist, Toby Hancock, 18, has been a patient of GOSH since childhood due to Marfan’s syndrome.
Hereditary syndrome affects connective tissue, making people tall and thin and affecting the functioning of their internal organs.
Toby, who is 6 feet 10 inches tall and walks with the help of crutches, said he would make the trip to Glasgow despite his health problems.
“I drive every day, but for health reasons I will not drive the whole distance,” he said.
“I use crutches every day. It’s a personal challenge for me. “
Toby said he took the trip to raise awareness about air pollution and out of gratitude to GOSH.
“You have given me massive help with various health problems,” he said.
“I am grateful enough not to have been seriously affected by air pollution around London, but I have friends with respiratory diseases who are seriously affected.”
A total of 70 cyclists take part, 26 of whom plan to ride the full distance.
You will cycle nearly 800 miles in stages and arrive at Gartnavel Hospital in Glasgow on Halloween.
One cyclist, nurse Samantha Drew, said she decided to attend the event after her children made her aware of climate change.
“You learn it in school and it is you who really brought my attention to climate change,” she said.
Ms. Drew said she was doing the cycle to inspire her daughter, who told her that she feels there is nothing she can do about climate change.