Original: The first section of the motorway, and the first motorway in the country, the Preston by-pass, was built by Tarmac Construction and opened by the then Prime Minister Harold Macmillan on 5 December 1958.
Simplified: The first section of the motorway was opened on December 5, 1958 and was what is now known as the Preston by-pass. It was opened by Prime Minister Harold Macmillan.