Year
 

Band Line-Up
 

Photo
 

DEC '75-MID '76

 Vocalist - Paul Day
 Guitar 1 - Terry Rance
 Guitar 2 - Dave Sullivan
 Bass Guitar - Steve Harris
 Drummer - Ron Matthews (Rebel)

MID '76-END '76

 Vocalist - Dennis Wilcock
 Guitar 1 - Dave Murray
 Guitar 2 - Dave Sullivan
 Bass Guitar- Steve Harris
 Drummer - Ron Matthews (Rebel)

END '76

 Vocalist - Dennis Wilcock
 Guitar 1 - Dave Murray
 Guitar 2 - Bob Sawyer
 Bass Guitar - Steve Harris
 Drummer - Ron Matthews (Rebel)

JAN '77-APR '77

 Vocalist - Dennis Wilcock
 Guitar 1 - Terry Wapram
 Bass Guitar - Steve Harris
 Drummer - Barry Purkins (Thunderstick)
 Keyboard - Tony Moore

APR '77 - MID '77

 Vocalist - Dennis Wilcock
 Guitar 1 - Dave Murray
 Bass Guitar - Steve Harris
 Drummer - Barry Purkins (Thunderstick)

MID '77 - JAN '80

 Vocalist - Paul Di'Anno
 Guitar 1 - Dave Murray
 Guitar 2 - Paul Cairns (then)
 Paul Todd (then) Tony Parsons
 Bass Guitar - Steve Harris
 Drummer - Doug Sampson