Hazlewood was born in 1971. His father was the Reverend Canon Ian Hazlewood who was also a traditionalist Catholic priest of the Church of England. His father’s brother, John Hazlewood, was the Bishop of Ballarat in Australia.
Hazlewood studied at De Montfort University, graduating with a Bachelor of Arts (BA) degree in 1997. He went on to train for holy orders at St Stephen’s House, Oxford, completing a Bachelor of Theology (BTh) degree in 2001.
Hazlewood was ordained in the Church of England as a deacon in 2001 and as a priest in 2002. He served his curacy at Holy Nativity Knowle and All Hallows Easton, churches in the Diocese of Bristol.
In April 2020, he was announced as the next Bishop of Lewes, a suffragan bishop in the Diocese of Chichester. He is the first traditionalist Anglo-Catholic priest to be made a Church of England bishop since 2015. He was consecrated a bishop on 15 July 2020 at Lambeth Palace Chapel by Norman Banks, Bishop of Richborough, on behalf of the Archbishop of Canterbury. Jonathan Goodall, Bishop of Ebbsfleet, and Jonathan Baker, Bishop of Fulham, served as co-consecrators.