Born in London, was a painter and a teacher.
Barker often depicts landscapes with water in an abstracted style.
From about 1943 the St Ives Society sought to integrate the new generation of modern artists into its exhibitions but in practice their work tended to be hung in the least prominent places. By 1948 the so-called 'Crypt Group' had grown to include among others David Haughton, Patrick Heron, Adrian Ryan and Kit Barker, organising separate exhibitions most notably in the crypt of the church itself.
Barker has exhibited many times including at the Waddington Galleries.
His work is held by Arts Council and many public galleries including Aberdeen, Bradford and Eastbourne.