UK Decay - Lineups 1979 - 1982:

This information adapted from the information here.

Lineup 1 (May - October 1979):

Guitar/Vocals: Steve 'Abbo" Abbott (ex-The Rezistors)
Bass: Martin 'Segovia' Smith (ex-The Rezistors)
Drums: Steve Harle (ex-The Rezistors) (RIP 1995)

UK Decay / Pneumania split 7" (1979).

Lineup 2 (October 1979 - January 1981):

Vocals: Steve 'Abbo" Abbott
Guitar: Steve Spon (ex-Pneumania)
Bass: Martin 'Segovia' Smith
Drums: Steve Harle

Recorded: The Black 45 EP (1980), For My Country 7" (1980) and Unexpected Guest 7" (1981).

Lineup 3 (March - April 1981):

Vocals: Steve 'Abbo" Abbott
Guitar: Steve Spon
Bass: Loraine 'Lol' Turvey (ex-The Statics)
Drums: Steve Harle

Lineup 4 (April - July 1981):

Vocals: Steve 'Abbo" Abbott
Guitar: Steve Spon
Bass: Creeton Kaos (aka Kreeton Kaos) (currently in Social Unrest)
Drums: Steve Harle

This lineup began the recording of For Madmen Only LP (1981).

Lineup 5 (July 1981 - December 1982):

Vocals: Steve 'Abbo" Abbott
Guitar: Steve Spon
Bass: Ed 'Twiggy' Branch
Drums: Steve Harle

Recorded: For Madmen Only (with help from Kaos, above), Sexual 7" (1981), Rising From The Dread 12" (1982) and can be heard on the band's final gig as preserved on the cassette-only A Night For Celebration (1983).

After this Abbo, Harle and Branch carried on as Furyo. Spon formed In Excelsis with former members of Ritual.