Phonogram Studios in South London. The change in studios was due to an unspecified dispute at De Lane Lea, halfway through the recording of the album. While Wood recorded the remainder of the record in Phonogram, several tracks were left in the first studio and he could not retrieve them until the dispute was settled, thus leaving him unsure of when the album could be released, even after recording had finished. Dick Plant and Mike Pela engineered the Dea Lane Lea sessions and Pete Oliff, Roger Wake and Steve Brown engineered at Phonogram. Also credited as an engineer, Wood produced and performed the entire album alone, in addition to painting the album cover and cartoons in the centrefold. Wood explained that he believed solo albums should feature a sole performer, as opposed to artists who hire session musicians like "flippin' Leon Russell and so on" to contribute ideas. He also considered it easier to record without having to explain some of his "strange songs" to a session group. When writing material for the album, Wood explained he would consider the instrumentation he desired to use on specific songs and then "just build it up track by track and see how it goes". In a contemporary interview, he said he worked better under pressure, and would finish writing tracks in the studio. The only other contributors to the album were vocalists Annie Haslam, who appears on "The Rain Came Down on Everything", and Phil Everly, who appears on "Get On Down Home". The later had been influential on Wood, who had previously recreated the sound of Everly's group the Everly Brothers during part of the "Rock Medley" on Boulders. Wood achieved the recording of what resembles a choir by playing "a sort of musical chairs", according to Jack Lewis of the Daily Mirror. The musician explained: "I hopped into one chair and sang. Then I sat in another and harmonised. I kept doing this with twenty-five chairs. Then I mixed it and got a good choir sound. I suppose I could have hired the Luton Girls, but I enjoy doing it this way." The album was completed in 1975 in time for release in the Christmas market, where Wood had fared well previously. Composition According to Wood, while Mustard is the follow-up album to Boulders, it is "also quite a different mixture of songs". Unlike Boulderswhich Stephen Thomas Erlewine describes as