During the pandemic many operations were delayed, with organ transplants, especially kidney, the hardest hit area.
Living donor transplants went down 60% during lockdown, according to NHS Blood and Transplant.
However, while Covid delayed many operations, last year Great Ormond Street Hospital performed 15 more kidney transplants than normal.
Five-year-old Bay’s family is grateful to the surgeons, doctors and nurses who made her operation happen.
Video by Leana Hosea