P is for… Pink Floyd
One of the most successful of all the prog rock bands, Pink Floydstarted life as a psychedelic band but when main songwriter Syd Barrett left the band, replaced by David Gilmour, the band began exploring more expansive soundscapes which by 1973’s The Dark Side Of The Moon paid dividends.
Floyd strode across the remainder of the decade like a colossus, peaking with the double album The Wall. Roger Waters left in 1984 but the band continued on regardless, to even greater success, and reunited for a one-off performance at 2005’s Live 8.
P is also for… Project
As in Alan Parsons Project, initially a studio-based project centred around producer Alan Parsons and manager and songwriter Eric Woolfson. Utilising various musicians and singers the pair created a string of successful concept albums and even had several hit singles before going their separate ways after a disagreement in 1990.