From Muriel Leo’s (nee Oliver, 1917-1998) Family Tree.

Denise Harrex (nee Oliver) b. 1959, in February 2009 says, Violet lives in Wellington, New Zealand.

Month and year of birth from Mary-Ann Morriss (nee Oliver), daughter of Leslie John Oliver b. 1904.

Year and country of birth from search on New Zealand BDM website in April 2024:
1944/63733. Oliver, Violet Laura. Mother: Laura Edith. Father: Leslie John

Full date of birth of 15 April 1944 from further searching in April 2024 on BDM Search by incrementally changing the date range for the birth.

Year and country of death, date of birth confirmed, from death search on New Zealand BDM website in April 2024:
2022/24916. Coles, Violet Laura. Date of birth: 15 April 1944

Full date of death of 10 August 2022 from further searching in April 2024 on BDM Search by incrementally changing the date range for the death.