It was rumoured at the time that The Clash released a double and a triple album in order to get out of their six album deal with CBS as early as possible. Maybe true, maybe not. A related rumour says they failed to realise that double and triple albums only count as single albums for contract...
This cover never gets old tho eh H?
Also illustrates perfectly why The Stranglers were considered Entry Level Punk for punks older brothers who read Melody Maker and who would really far rather be listening to The Doors. They could even play their instruments and everything.