Halsey was educated at King's College School, Wimbledon and King's College London. After this he took holy orders at Wells Theological College and began his ministry as a curate at St. Peter's Church, Petersfield. A wartime chaplain in the Royal Naval Volunteer Reserve, he then served the Christian ministry successively in the West Country (Plymouth and Netheravon), Kent (Chatham, Bromley and Tonbridge) and Cumbria, his last post being Bishop of Carlisle from 1972 to 1989.
He and his wife Rachel had four daughters: Sarah, Jill, Jane and Mary. Sarah is married to David French, the former Chief Executive of the Westminster Foundation for Democracy. Rachel died in October 2013 in Cumbria.
- Who’s Who: London, A & C Black, 1992 ISBN 0-7136-3514-2
- Daily Telegraph Obituary p 29: Issue no 47,909 dated Monday 15 June 2009
- A history of Christianity in Petersfield: the stories of the local churches: Petersfield, Petersfield Area Historical Society, 2001 Monograph No 4 ISSN 0262-5970
- List of rectors of St Peter and St Paul Archived 29 July 2007 at the Wayback Machine
- Suffragan Bishop, 1968–72 Who’s Who: London, A & C Black, 1970 ISBN 0-7136-1140-5
- The Times, Thursday, 31 Aug 1972; pg. 14; Issue 58567; col A Church News: New Bishop of Carlisle chosen
- Organisation web-site Archived 9 February 2007 at the Wayback Machine
- "Halsey Rachel - Obituary - News and Star Announcements - News and Star". www.myfamilyannouncements.co.uk. Retrieved 14 June 2019.
|Church of England titles|
Russell Berridge White
| Bishop of Tonbridge
1968 – 1972
Philip Harold Ernest Goodrich
Sydney Cyril Bulley
| Bishop of Carlisle
1972 – 1989