Heavy rain could cause disruption on roads in Berkshire

Clare Dinnis, flood duty manager for the Environment Agency, warned commuters should check for travel updates before taking on rush-hour journeys.

The Met Office forecasts maximum temperatures of 6C, feeling colder in strong winds from the north, and has issued a yellow rain and wind warning for Sunday night and Monday morning covering London and the south-east, the east Midlands and the east coast as far north as Yorkshire.

How many flood warnings have been issued across Britain?

Forecasters say the rain is expected to last for much of Monday with accumulations of 25-40mm could occur, with perhaps 50-70mm in places.

The low temperatures could even see heavy rain turn into snow in some parts of the United Kingdom, forecasters have warned.

Further rain or showers are likely to spread from the west across most parts mid-week and across the north later in the week, but becoming drier and sunnier in the south and temperatures at least returning to average for most by the Bank Holiday Weekend.

Using the 1.5km resolution also enabled researchers to model the likelihood of localised storms which could cause problems such as flash-flooding.

Trains and buses could be affected, with the Met Office warning of possible delays or cancellations.

The yellow weather warning is likely to affect much of eastern, southeastern and central England.

However, it is unlikely to settle, the spokesman added.

"It's unusually cold, wet and windy for this time of the year, there will be some very hard driving conditions and disruptions at airports with the strong northerly winds".

Some hilly areas could see some sleet in the early hours of Monday morning but the Met Office emphasised they did not expect "any impact from the wintry weather".

There will be a greater chance of seeing some sunshine across Scotland, Northern Ireland and northern England, with temperatures between 8C and 12C.

A dusting of snow can be expected on higher ground.