UK jazz guitarist, born in Salford in 1962

Mike Walker US guitarist, credited on private release from Springfield, Missouri in 2004
Mike Walker Canadian house DJ & producer.
Mike Walker UK pianist, vocalist, producer - possibly the same as (5)
Mike Walker UK engineer, often credited for mastering
Mike Walker Keyboardist, pianist, credited on a Richmond Fontaine release from 1999
Mike Walker Multi-instrumentalist, credited on a Royal Ruckus CD, US 2002
Mike Walker Drummer, credited on an US punk release from 2005
Mike Walker Pianist, credited on a 1983 release from NZ
Mike Walker US guitarist, rec. on a 1977 release from Indiana
Mike Walker Credited for playing keyboards & synthesizer with the American reggae band Rolly Gray And Sunfire on a 1983 release.

He played with:
Nick Purnell, London Trombone Quartet, Mike Gibbs Orchestra, Steve Plews, Peter Fairclough, Richard Iles, Roy Powell, Julian Argüelles, Tony Faulkner Jazz Orchestra, Steve Berry, Phil Bancroft, Stevie Williams, Anthony Braxton and the Creative Jazz Orchestra, John Helliwell, Framework, Vibration Music Society, George Russell and the Living Time Orchestra, The Impossible Gentlemen