Many thanks Aghadowey, where would I be without you!
I have just found that Catherine was a widow with her 1st Marriage to David Boyd- her parents were David McCormick & Mary Brown. She subsequently married William Pollock.
William Pollocks parents were John Pollock and Margaret Adams.
None of this makes the search any easier, but I wil try the church records as you suggest.
Thanks for the direction!

Alastair