"This is Disco Clash..." goes the standard slag, if you want any more you can sing it yourself.
Not much to add that the liner notes below won't tell you, other than this was released in the early nineties, after a re-mix of "Guns of Brixton" and later an ad-sponsored re-release of "Should I Stay of Should I Go" brought the Clash back into critical and commercial grace.
Of course this was the golden era of the cassette single (maxi-single?), so of course this was released on Chromium Dioxide.
Many people have tried their own Clash remixes (see "This is Dub Clash" here), here's another example.
P.S. Thanks to schoolcraftbump for the CD scans