A new study has found that even with no alcohol in their systems, drivers who have been out on the town the night before are far more prone to erratic driving the morning after.

Research commissioned by the UK Road Safety Authority found “morning after” drivers are likely to speed, spend longer speeding and commit more traffic offences than those who have stayed in, even if they could pass a breath test.

The problem is mainly down to tiredness caused by the disruption drink can have on the quality of sleep.