Hi David
Welcome to Rootschat
Pre 1754 you are lucky to get anything more than the two names to a marriage. From 1754 the parish of residence at the time of the marriage and the names of the witnesses were added. Fathers' names were added from 1837, but mothers' names, birthplace, and previous residence have never been recorded, not even today.
The only additional details on the Colmworth marriage are the words "by certificate from Roxon". I assume this to be Roxton, but I can't tell if it relates to Philip, or Sarah, or both
David