Blackburn Buccaneer - version overview:
Blackburn NA.39 - pre-series
Buccaneer S.1 - Navy battle version
Buccaneer S.2 - version with more powerful Spey engine
Buccaneer S.2A - S.2 modified for the RAF
Buccaneer S.2B - S.2 RAF modified for Martel anti-radar and anti-ship missiles
Buccaneer S.2C - S.2 Royal Navy modified to S.2A standard
Buccaneer S.2D - S.2 Royal Navy modified for Martel anti-radar and anti-ship missiles
Buccaneer S.50 - export version for South Africa
Source.
http://en.wikipedia.org/wiki/Blackburn_Buccaneer
Blackburn NA.39 - pre-series
Buccaneer S.1 - Navy battle version
Buccaneer S.2 - version with more powerful Spey engine
Buccaneer S.2A - S.2 modified for the RAF
Buccaneer S.2B - S.2 RAF modified for Martel anti-radar and anti-ship missiles
Buccaneer S.2C - S.2 Royal Navy modified to S.2A standard
Buccaneer S.2D - S.2 Royal Navy modified for Martel anti-radar and anti-ship missiles
Buccaneer S.50 - export version for South Africa
Source.
http://en.wikipedia.org/wiki/Blackburn_Buccaneer