The album represented a significant change in The Clash's musical style, which now featured major elements of ska, funk, pop, soul, jazz, rockabilly and reggae far more prominently than in their previous two albums.
On the original version of the album, "Train in Vain" was not listed on the sleeve, nor the label on the record itself, but a sticker indicating the track was affixed to the outer cellophane wrapper. It was also scratched into the vinyl in the run-off area on the fourth side of the album. Later editions included the song in the track listing.
25th anniversary edition bonus disc – "The Vanilla Tapes"