Street artists raced against the clock to paint an 8ft mural in the average time it takes runners to finish the London Marathon to raise awareness of the Great Ormond Street Hospital Children’s Charity fundraising appeal.
Two street artists took just four-and-a-half hours to paint the artwork near Tower Bridge in central London, which features the face of six-year-old Sienna Halls, who was treated for leukaemia at Great Ormond Street Hospital.
