Dominic Cummings did break lockdown rules when he made a 50-mile journey to Barnard Castle, an investigation by Durham Police has concluded.
The Prime Minister’s most senior aide claimed he made the trip on Easter Sunday, with his wife and four-year-old son, to check he was fit to drive after suffering coronavirus-related eyesight problems.
Mr Cummings insisted he had acted “lawfully and reasonably” at all times when he made the 260-mile journey from London to Durham to self-isolate at his parents’ farm at the end of March.
But The Telegraph has learned that an investigation by Durham Police has concluded he did commit a "minor breach" of the guidelines when he drove to Barnard Castle on April 12.
However the force, which according to the most recent data, has issued 137 fines for lockdown breaches, said it would not be taking any further action against Mr Cummings.