It had to happen at some point. In May 1991, the Stock Aitken Waterman era ended when Matt Aitken walked away from his role as one third of the songwriting and production trio. In this episode, he explains what prompted his decision and we explore the changing nature of PWL at the time, which was a contributing factor in the split. Mike Stock also weighs in on Matt's departure and reveals whether he blames his musical partner for leaving. In terms of the music, we look at one of the most polarising singles in the SAW catalogue — and one which was among the last things Matt worked on. The latest Neighbours stars to come to the Hit Factory, Gayle and Gillian Blakeney (aka The Twins) were hoping to follow other SAW stars up the chart, but "All Mixed Up" was a commercial disappointment. It also divides fans like almost no other track. We follow the sisters' story from their early appearances on Australian TV to their deal with Mushroom Records and discuss why their SAW experience wasn't so great and why their single provokes such strong reactions. Plus, we take a quick look at the 1991 remix of "Roadblock", which featured in-demand rapper Einstein.Support the showSubscribe for bonus material at chartbeats.com.au/sawTwitter: @ChartBeatsAU, @MrMattDenbyInstagram: @chartbeatsauFacebook: Chart Beats: A Journey Through PopEmail: chartbeats.au@gmail.com