 He was assisted in his legal career by family ecclesiastical connections – John Wynne, Bishop of St Asaph from 1715 onwards, was a relative, and his father-in-law was a trusted adviser to successive Bishops of Hereford.Wynne was one of the lawyers who represented Francis Atterbury, Bishop of Rochester, in his trial in 1723 on charges of high treason.He also advised Edmund Gibson, Bishop of London in the 1740s, on legal matters concerning the marriage of Gibson's daughter.