Complex sentence: He was Knight President of the London-based Society of Knights of the Round Table from 1988 until 1995, the Director of Overseas Relations for St. John Ambulance from 1989 until 1995, and Vice President of the Royal National Lifeboat Institution (RNLI).
Split into simpler sentences: He was Knight President of the London-based Society of Knights of the Round Table from 1988 until 1995. He is the Director Overseas of St. John Ambulance and Vice President of the Royal National Lifeboat Institution (RNLI).