Two men's bodies have been pulled from rough seas off the coast of southeast England and the military has been mobilised as Britain braces for another weekend of stormy weather.

The fourth named storm of the season, dubbed Dennis by Britain's Met Office weather service, has prompted widespread travel disruptions and has the potential to cause more damage than last weekend's Storm Ciara.

One man's body was pulled out of the sea by a lifeboat crew from the Royal National Lifeboat Institution on Saturday (local time) after a seven-hour search following a distress call from a Maltese tanker.

Police said they were trying to establish the man's identity.

In a separate incident, the body of a second man was pulled from the sea on Saturday afternoon. Authorities said the death was not being treated as suspicious.

The Met Office had 31 flood warnings in place around England. Another 26 were issued in Scotland and six in Wales.

The storm was expected to deepen late Saturday and on Sunday, with all parts of the country potentially in the line of fire.

The storm could produce winds of up 157km/h and monster waves above 30 metres, according to the US National Weather Service's Ocean Prediction Center.

On Saturday, around 75 British army personnel and 70 reservists were helping outstretched communities in the flood-hit Calder Valley region in West Yorkshire, constructing barriers and repairing damaged flood defences.

Source: 9News