Staff and patients from six children's hospitals are cycling from London to the COP26 climate change conference at Glasgow to raise awareness about the negative impact of pollution on children's health.
The initiative, Ride for their Lives, will call on world leaders to make air pollution a policy priority. Once they've arrived in Glasgow, the group will hand over letters to political representatives at the COP26 climate change conference.
Great Ormond Street Hospital's (GOSH) team gathered outside the hospital on Sunday morning before making their way to Granary Square.
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