B'Sides Themselves is a compilation of single B-sides by the British neo-progressive rock band Marillion, which was released on CD only in January 1988. This was the first time that those B-sides were made available in the then still relatively new Compact Disc format (with the exception of "Tux On", which had featured on a limited edition CD single of "Sugar Mice" that was only sold at concerts). However, vinyl LP and cassette versions were issued in June 1988.