Lovelee was born in Narrabri and was educated at Farrer Agricultural College in Tamworth. He worked for the British Merchant Navy at Glebe Island as a fitter and machinist, and was active in youth affairs as the founder of the Bankstown blue light disco and a director of the DC24 drug centre. Having joined the Australian Labor Party in 1975, he served for a period on Bankstown City Council.
In 1988, he was selected as the Labor candidate for the traditionally safe seat of Bass Hill. He was previously the ALP candidate in the 1986 by-election for seat triggered by the retirement of the previous member and former Premier Neville Wran, but Lovelee was defeated by Liberal candidate Michael Owen. At the 1988 general election Lovelee defeated Owen in a rematch, but the seat was abolished in 1991 and Lovelee retired.
- Parliament of New South Wales (2008). "Mr William Thomas Lovelee". Former Members. Parliament of New South Wales. http://www.parliament.nsw.gov.au/prod/parlment/members.nsf/1fb6ebed995667c2ca256ea100825164/db06d2d4ffa8a469ca256e3f0008a5cb?OpenDocument. Retrieved 24 January 2010.
- Green, Antony (2010). "Contests for Bass Hill". NSW Election Database. Parliament of New South Wales. Archived from the original on 24 May 2011. https://web.archive.org/web/20110524214621/http://www.parliament.nsw.gov.au/resources/nswelectionsanalysis/DistrictIndexes/BassHill.htm. Retrieved 24 January 2010.