"Party Seacombe" includes a rock accompaniment that Clayson likens to the style of Pink Floyd, and the song equally recalls the Beatles' instrumental "Flying", with which it shares a twenty-bar blues structure. Recorded with the Remo Four, it includes wah-effected lead guitars, one of which resembles the sound of a human voice; phase-shifted treatment on the acoustic rhythm guitar; and additional drums and percussion, possibly played by Starr. Writing for "NME Originals" in 2005, Adrian Thrills described the track as "Whimsical '60s psychedelia from George's experimental dabblings".