Eighteen percent of vehicles used on company business are unroadworthy, according to the latest Vehicle Monitor Survey carried out by vehicle management company Total Motion.

It also found a further 35% were not properly maintained. The survey covered both company and privately owned vehicles used on company business.

Surveyors also checked drivers and found that six percent had invalid licences, 3% had no tax and 12% of those using private cars were not properly insured.