Counties 1 Middlesex (formerly Middlesex 1) is a level 7 Rugby Union league with teams from north-west London taking part. Historically, the league was a level 10 completion, and the division was cancelled at the end of the 1995âÂÂ96 campaign after nine seasons due to the merger of the Hertfordshire and Middlesex regional leagues. After nearly twenty years, ahead of the 2025âÂÂ26 season, the league was re-formed following the decision to have mostly Hertfordshire teams in Counties 1 Hertfordshire. Promoted teams typically move up to Regional 2 Thames and relegated sides go down to Counties 2 Middlesex.
This is the first season in which Hertfordshire RFU and Middlesex RFU clubs from Counties 1 Herts/Middlesex moved to their respective county leagues. Teams in this league were level transferred from Counties 1 Herts/Middlesex or were promoted from Counties 2 Hert/Middlesex.
Not contested
When league rugby began in 1987 this division contained the following teams:
The original Middlesex 1 was a tier 8 league with promotion to London 3 North West and relegation to Middlesex 2.
The creation of Herts/Middlesex at the beginning of the 1992âÂÂ93 season meant that Middlesex 1 dropped to become a tier 9 league. The introduction of National 5 South for the 1993âÂÂ94 season meant that Middlesex 1 dropped another level to become a tier 10 league for the years that National 5 South was active. Promotion was into the new Herts/Middlesex league while relegation continued to Middlesex 2. The merging of the Hertfordshire and Middlesex regional divisions at the end of the 1995âÂÂ96 season meant that Middlesex 1 was cancelled.