(CNN) Tom Moore, the 99-year-old war veteran raising funds for the UK's National Health Service (NHS) by walking 100 lengths of his garden, has completed the challenge and raised more than £12 million ($15 million) in donations.

Moore walked the last 10 lengths of his garden on Thursday morning, aided by a walking frame.

Soldiers from the 1st Battalion Yorkshire Regiment gave Moore a guard of honor as he completed the final lap.

Moore began the fundraiser on April 8, initially hoping to raise £1,000 for NHS Charities Together, which raises funds for UK hospitals, including for staff, volunteers and patients affected by the coronavirus crisis.

More than 648,000 individual donations had been made to his JustGiving page at the time of writing, topping £12.7 million ($15.8 million).

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