People walk in the snowon Westminster Bridge in central London, Britain on Dec. 10, 2017. (Xinhua/Han Yan)

LONDON, Dec. 10 (Xinhua) -- More snowfall is expected in Britain as large parts of the island country were hit by heavy snowfall on Sunday morning, with an amber weather warning issued across the country.

An amber warning of snow came into force at 4 a.m. (UTC) on Sunday, affecting Wales, the Midlands and parts of northern and eastern England.

Flights were already suspended at Birmingham airport and roads affected in Wales, Midlands and northern and eastern England.

Motorists are facing severe delays as traffic was reduced to a standstill or a slow crawl in a number of areas.

Temperatures are also likely to reach lows of -10 degrees Celsius in some parts of Scotland and Wales, falling to as low as -14 degrees Celsius in isolated rural areas.

Heavy snow and ice continues to wreak havoc across the country, with up to 25 cm of snow predicted later Sunday.

"Road, rail and air travel delays are likely, as well as stranding of vehicles and public transport cancellations," the Met Office said. "There is a good chance that some rural communities could become cut off."

Cars are seen in the snow on Westminster Bridge in central London, Britain on Dec. 10, 2017. (Xinhua/Han Yan)

Residents in London woke up to a blanket of snow on Sunday morning as heavy snow fell over the Midlands and Wales, thinning into lighter showers as the day progresses.

Lines on the London Underground have already announced they will expect utter chaos on Sunday day on Transport for London.

Drivers have been warned to "think twice" before they get behind the wheel as temperatures are set to plummet in most parts of the country.