South Mimms services is a motorway service area accessible from Junction 23 of the M25 motorway which is also Junction 1 of the A1(M), in England near South Mimms, Hertfordshire. Constructed in 1986 as the first service area on the M25, it is operated by Welcome Break. It is built on the site of Bignell's Corner, named after a garden centre, Bignell and Cutbush, which was close to the junction of the old A6, and A1. At the junction there was also a pub, the Middlesex Arms, and an Esso Motor hotel, near which developed a notorious truck stop and the Beacon Cafe.