Cameron pledges to aid flood victims David Cameron has expressed shock at the flooding and high winds that have battered the southwest and elsewhere and promised to ensure help for the victims, as large parts of England remained on flood alert and two more people died. One, a 21-year-old woman, was killed by a falling tree in Exeter on Saturday night . A 70-year-old man was reported to have been killed on Sunday after his car crashed into a flood-swollen river in Cambridgeshire. He was the third person to die, following the death of a man in Chew Stoke near Bath after his car was swept away and trapped under a bridge. The prime minister said on Twitter: "Shocking scenes of flooding in Cornwall and around the country. Government will help ensure everything is being done to help."" Richard Benyon, environment minister, said that while more than 400 homes had so far been flooded, the "silver lining" was that more than 24,000 had been protected by recently constructed flood defences. One severe flood warning remains in place in Helston, Cornwall, although on Sunday there was a respite from the downpour. More than 200 other flood warnings are in place across England, including nearly 70 in the southwest and 100 in the Midlands. The M25 was closed clockwise at the QE2 bridge in Kent because of high winds and parts of the M5 motorway in Gloucestershire were closed because of flooding. Persistent rain is expected to continue in northern England and into Scotland during Sunday, turning heavy in places but clearing quite quickly from the south, the BBC weather centre said. But further heavy rain is expected to affect Wales and southwest England during Sunday afternoon and evening. It warned the public to beware of localised flooding because the ground was saturated. Mr Benyon said localised management of flood situations by local authorities, emergency services and the Environment Agency appeared to be working. They will have the local resilience policies in place and my understanding is that it has worked pretty well. Thus far the system works, but we want to get people back in their homes as quickly as possible," he told the BBC. He also said he wanted to protect businesses as well as homes, highlighting the plight of farmers on the Somerset Levels whose land has been used to hold flood water. Many roads were closed because of flooding, particularly in the southwest. Homes in Wiltshire were flooded on Saturday, with Malmesbury badly affected. National Rail said there were delays between Newton Abbot and Exeter St Davids because of flooding and a landslip. Trains were likely to be disrupted between Exeter, Taunton and Bristol until Monday. Flooding was also causing disruption between Oxford and Worcester. East Anglia was hit by winds of more than 50mph and flooding affected many parts of North Yorkshire. People in Cornish villages were forced to flee their homes on Saturday night as flood water and torrential rain caused "serious threats to life." Special rest centres were set up in the worst-hit villages, though Cornwall Council said these were all later stood down.