Complex sentence: In the late 1990s, many football supporters began to move away from the brands that were considered the casual uniform, because of the police attention that the casual styles now attracted; several designer labels also withdrew certain designs from sale after they became associated with casuals.
Split into simpler sentences: In the late 1990s, many football supporters began to move away from the brands that were considered the casual uniform, because of the police attention that these brands attracted. Several designer labels also withdrew certain designs from sale after they became associated with casuals.