Sweeping changes to the way separated couples financially support their children have isolated single parents and made them feel like they are "going it alone", a 32-year-old mum has told Good Morning Britain.
Ayse Inal, who has a four-year-old son and a difficult relationship with his father, said she was "really angry, because the money that is supposed to be coming to my son, they [Child Maintenance Service] are actually going to be taking a portion of that money."
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TV presenter Helen Skelton is a supporter of the campaign and is calling for more parents to get out on their bikes with their children.
Mrs Justice Nicola Davies will sentence Berlinah Wallace, 48, at Bristol Crown Court.
The JR4NHS group was founded by three doctors and a university professor, and supported by the renowned physicist until his death in March.