Original sentence: The Rt Rev Colin Ogilvie Buchanan was the Bishop of Aston from 1985 until 1989 and then (after a gap during which time he was Vicar of St Mark's in Gillingham, Kent), Bishop of Woolwich
Edited sentence: The Rt Rev Colin Ogilvie Buchanan was the Bishop of Aston from 1985 until 1989, and then (after a gap during which time he was Vicar of St Mark's in Gillingham, Kent) Bishop of Woolwich