Third attempt and not even sure if it's worth it with all I can offer.
But Colin and Shirley were part of the 1960's "folk" scene in London and were regulars at among others the Ballads and Blues Club in London post departure of Ewan and Peggy. They were always very entertaining and good people to deal with. I understand that they went to Germany and opened a folk club where they became very popular and there they remain apparently.

Hoot