The Metropolitan Police were called to Dollis Road in Finchley at around 12:40 GMT to reports a tree had fallen onto a moving car, and the man was pronounced dead at the scene.

Chief Inspector Guy Ellwood, from the North West Command Unit, said: "This is a deeply tragic incident and our thoughts are with the loved ones of the young man who lost his life."

A London Ambulance Service spokesperson said it sent incident response officers, paramedics from its hazardous area response team, and a trauma team from London's Air Ambulance to the scene.

Earlier, Police Scotland said a man died after being hit by a falling tree in southern near Castle Douglas.

During Storm Boelo and the earlier Storm Austen, which hit the UK on Friday, 838,700 properties across the country faced power cuts, according to the ENA.

Wind gusts peaked on Sunday morning at 85mph in Machrihanish, in Argyll and Bute, and 84mph in both Stornoway in the Outer Hebrides, and Capel Curig in north Wales.

An amber wind warning issued by the Met Office was in place until 21:00 on Sunday across Scotland and parts of northern England.

A yellow warning that also covered other areas of the north of England, including Liverpool, Manchester, Leeds, Sheffield and Newcastle-upon-Tyne, as well as parts of the East and West Midlands and North Wales, also expired at 21:00.

The Met Office urged people to "stay indoors as much as possible", adding: "If you do go out, try not to walk, or shelter, close to buildings and trees."

The strongest gusts have continued to spread eastwards across the UK on Sunday.

The towns of the Clyde coast in Scotland have been hit particularly hard by the severe weather. The main Skelmorlie to Largs road has been badly damaged and a number of businesses in Largs were flooded overnight on Saturday.

In Gourock, a boat ended up on the side of the road and there have been reports of power being out in Girvan all throughout Sunday.

In Dumbarton, on the north bank of the River Clyde, Muhammad Zubair Ashraf's mobile phone shop was flooded overnight.

He estimated between £5,000 and £10,000 of damage was caused and said he was "heartbroken" at the scale of the losses.

Travel has been affected across the country, with police in Scotland warning against unnecessary road journeys.

Ferry services have been impacted, some flights to and from Belfast, Glasgow, Aberdeen and Dublin airports have been cancelled, and train services across the UK have faced disruption.