World War II veteran Tom Moore is raising money for the NHS, by aiming to complete 100 laps of his garden by his 100th birthday at the end of April.

A 99-year-old World War II veteran has raised nearly £12.5 million ($15.6 million) for workers in the U.K.'s National Health Service during the coronavirus pandemic.

With the help of a walking frame, Tom Moore completed 100 lengths of his backyard, which is 25 meters (82 feet) long.

Moore aimed to walk the distance before turning 100 years old next week and completed the challenge well ahead of time by doing 10 laps a day.

He decided to take on the challenge after receiving treatment from the NHS for skin cancer and a broken hip, praising health-care workers for their "patience" and "kindness" in a TV interview.

Moore smashed his original fundraising target of £1,000 ($1,257), receiving around $10 million in donations in just a few days.