When was M23 motorway built in the UK?

The M23, part of Britain's motorway system, was constructed between 1972 and 1975. It is most known for it's accessibility to the M25 - the circular motorway that encircles London and nearby communities.

The M23 runs north/south and connects to the A23 continuing on to Brighton. The M23 is a primary access road for Gatwick Airport, Crawley and other communities in West Sussex.