A woman has been killed by a falling tree branch in London's Kew Gardens during wet and windy weather conditions.

The woman, believed to be aged about 30, was pronounced dead at the scene, Scotland Yard said.

A spokesman said officers were called to the Royal Botanical Gardens in Kew, south-west London, by the London Ambulance Service at about 2.10pm on Sunday and police and paramedics attended the scene.

The woman's death is not being treated as suspicious and the spokesman could not confirm whether the matter would be referred to the Health and Safety Executive (HSE).

The incident came as severe weather battered parts of Britain, which heavy rain and strong winds expected to spread further across the country throughout Monday.

Forecasters predict up to 60mm rainfall and 60mph winds over the next 36 hours, with pockets of the south west, northern England and Scotland particularly susceptible to flooding.

The Environment Agency has already put out several flood alerts, and said further warnings are likely to be issued for river and surface water flooding elsewhere. People in the south west and south east were urged to prepare for possible flooding before going to bed on Sunday.

Paul Mott, senior meteorologist at MeteoGroup, warned: "There is going to be a big change in the weather from what we have had recently."

Parts of Britain have basked in warm temperatures in the mid-20s during September, a welcome break from the rain and wind which dogged much of July and August.

But Mr Mott said: "Over the next 36 hours, quite a few areas are looking at 30 to 40mm of rain, with as much as 50 to 60mm locally. There is likely to be some localised flooding, and gusts of up to 60mph in parts of Scotland."