Marvin, Welch & Farrar (aka MWF) were a 1970s British and Australian popular music group formed by Hank Marvin and Bruce Welch, both members of The Shadows – as a change of direction manoeuvre during 1970 to 1973 – and John Farrar (ex-The Strangers). The distinction was that while The Shadows were famous for their instrumental work, Marvin Welch & Farrar were a trio, vocal harmony group. They have been favourably compared to USA folk close harmony group Crosby Stills Nash and Young (aka CSNY) and The Hollies.

Their second album, Second Opinion (1971), produced by Peter Vince, in a private poll during the 1970s by EMI record's Abbey Road's sound engineers, was voted as one of the best ever sounding albums recorded at these studios.