Middlesex 4 was an English level 13 Rugby Union league with teams from north-west London taking part. Promoted teams moved up to Middlesex 3 and since the cancellation of Middlesex 5 at the end of the 1991–92 season there was no relegation. The division was cancelled in at the end of the 1995–96 campaign after nine seasons due to the merger of the Hertfordshire and Middlesex regional leagues.
Original teams
When the division was created in 1988 it contained the following teams:
The creation of Herts/Middlesex at the beginning of the 1992–93 season meant that Middlesex 4 dropped to become a tier 12 league. The introduction of National 5 South for the 1993–94 season meant that Middlesex 4 dropped another level to become a tier 13 league for the years that National 5 South was active. Promotion continued to Middlesex 3 but the cancellation of Middlesex 5 at the end of the 1991–92 season meant there was no longer relegation. The merging of the Hertfordshire and Middlesex regional divisions at the end of the 1995–96 season meant that Middlesex 4 was cancelled.
^Enfield Ignatians was a newly created club resulting from the merger of Enfield Old Grammarians and Old Ignatians RFC - both of whom were relegated from Middlesex 3 North at the end of the 1987–88 season (10th and 7th respectively).[1]
^Champions Actonians were promoted two levels up into Middlesex 2 due to restructuring as a result of the introduction of the new Herts/Middlesex division for the following season.
