It was the second successive week that police in the West Country have found that a huge percentage of caravans fell short of basic safety standards.
The previous week's 90 per cent failure rate in roadside checks was described as "absolutely diabolical" by a road safety officer, Sergeant Dave England. The "horrifying" figures showed that some kind of safety certificate for caravans was required immediately, he said.
Dozens of caravans were checked at a motorway service station outside Exeter on Saturday. Police uncovered a catalogue of faulty tyres and incorrect loading which could affect steering. "People think they can just hook up a caravan and drive away," a police spokesman said.
Officers handed out advice to owners whose caravans did not come up to scratch, and warned them that in future there could be prosecutions.