Who is Andy Bown?

Bown's first major band was The Herd, along with Peter Frampton. After The Herd dissolved he spend two years with Judas Jump^[1] who were the opening act of the Isle of Wight Festival 1970. He played keyboards (and bass during his last year in the band) for Frampton in the 1970s. and started playing keyboards for Status Quo in 1973 as a session musician, first appearing on their Hello! album in that year. He joined Status Quo as a full member in 1976.

Bown also released a glam rock single in the mid 1970s, called "New York Satyricon Zany".

More notably, he was the bass player in the "Surrogate Band" during Pink Floyd's The Wall tour in 1980 and 1981. He also did some keyboards for Pink Floyd's The Final Cut album. Andy Bown also played Hammond organ and 12-string guitar during the recording of Roger Waters' solo album The Pros and Cons of Hitch Hiking in 1984. He didn't take part in Waters' subsequent tours, though.

He still plays keyboards, guitar and harmonica with Status Quo to this day, and is an integral part of the band, having co-penned many well known Quo songs on various studio albums, most prominently collaborating with Rick Parfitt on the group's 1979 hit "Whatever You Want". He also has admitted to being 'The worst drummer in the world'.

*courtesy of wikipedia

And thanks to Alan for additional information. :)