There is this death in UK but the date of birth would not allow for a marriage in 1934 so I don't think it's the right person - just thought I'd post it as a co-incidence.
From: England & Wales, Civil Registration Death Index, 1916-2007
Mary Violet GARE, aged 67
Birth Date: 12 Dec 1923
Death Registration Date: Feb 1991
Registration district: Kingston Upon Thames
Vol 13, p2064
Judith