Four birdies on the front nine helped Willett to finish with a four-under 68 and 18-under for the tournament, two better than Swede Lagergren and compatriot Hatton, both of whom faded towards the end as Willett made eight successive pars to seal victory on Sunday.

Hatton, who led at the halfway stage, birdied his last hole to end with a five-under 67 for the round, while Lagergren fired five birdies on the front nine en route to a six-under 66.

Hatton's Ryder Cup teammate Shane Lowry, who was within three shots of Willett coming into the final round, was another whose form let him down on the greens as he finished tied for fourth at 15 under.

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It has been a tough year for former Masters champion Willett, who tested positive for Covid-19 in March and was rushed to hospital in June with appendicitis soon after playing at the Memorial tournament.

"It's magical," Willett said of his eighth European Tour win. "On British soil, with everyone here. It's been a great week."

Deyen Lawson was the highest-placed Australian closing in 27th, 11 shots off the lead.