[1] Sixteen district health authorities were formed in the Northern Region in 1982, replacing nine area health authorities: Reorganisation in 1992 led to a reduction in the number of districts to fourteen: In 1994 the Northern region became part of the larger Northern and Yorkshire Region, and there were further amalgamations of districts: Seventeen district health authorities were formed in the Yorkshire Region in 1982, replacing seven Area Health Authorities: Reorganisation in 1991 to 1993 led to a reduction in the number of districts to seven: In 1994 the Yorkshire Region became part of the Yorkshire and Northern Region.
Also in 1982 the borough of Spelthorne, Surrey was received from the South West Thames Region, to which it returned in 1993.
Fourteen district health authorities were formed in the North East Thames Region in 1982, replacing seven Area Health Authorities: † Bloomsbury and Islington District was created in 1990.
Reorganisation in 1990 and 1993 led to a reduction in the number of districts to seven: Fifteen district health authorities were formed in the South East Thames Region in 1982, replacing five Area Health Authorities: Reorganisation in 1993 and 1994 led to a reduction in the number of districts to eight: Thirteen district health authorities were formed in the South West Thames Region in 1982, replacing five Area Health Authorities: Reorganisation in 1993 and 1994 led to a reduction in the number of districts to ten: Ten district health authorities were formed in the Wessex Region in 1982, replacing four Area Health Authorities: Reorganisation in 1994 led to a reduction in the number of districts to six: Also in 1994, the Wessex Region was merged with the South West Region to form the South and West Region.
There were no Area Health Authorities in Wales, the entire principality being under the jurisdiction of the Welsh Office.