Premise: Fat Mattress were an English folk rock band that formed in Folkestone in 1968. Founded by guitarist and vocalist Noel Redding, during his time as bassist for The Jimi Hendrix Experience, and vocalist Neil Landon, the band was completed by multi-instrumentalist Jim Leverton and drummer Eric Dillon. The band released two albums – "Fat Mattress" and "Fat Mattress II" – before splitting up in 1970.
Hypothesis: A band from England known as Fat Mattress formed in 1968 by the guitarist and singer Noel Reddding, who was  the bassist for The Jimi Hendrix Experience at that time, along with four other guys minus one guy that made a total of three guys plus one guy in the band.