Knightley has co-written a number of songs with long-time friend, pianist and producer Matt Clifford. Clifford’s close relationship with the Rolling Stones and Mick Jagger in particular led to Beer playing mandolin on the band’s Steel Wheels CD and to Knightley playing guitar and mandocello on Jagger’s 2001 solo outing ‘'Goddess in the Doorway'’. Knightley also co-wrote The Dohl Foundation’s 2017 single Mother Tongue with Johnny Kalsi (who also recorded with Show of Hands) and writes for folk/reggae band E2 and West Country rock band Willie and the Bandits. Show of Hands also collaborate with the English folk roots and reggae inspired band 'Edward ll.' (Previously known as Edward 2nd. and the Red Hot Polkas).