Probably:

Mavis Florence "Flossie" Swyers was born in Leeds, Yorkshire, England on 16 April 1906. Her parents were David and Ada Masya Gittel Swyers, nee Babbin. Her death was registered in Camden, Greater London, England during April 1993.

US Social Security Death Index
Mavis F. Swyers, born 16 April 1906, died 30 March 1993.
Last residence: 800, U. S. Consulate, London, England, UK.

Wills and Adminiostrations, 1993
Swyers, Mavis Florrie, of Flat 301, Endsleigh Court, Upper Woburn Place, died 30 March 1993.
Probate Ipswich 16 July £473732.

Lists of departing passengers
24 February 1947, Southampton, "Queen Elizabeth" to New York, USA (05 March 1947):
Mavis Swyers, aged 40, civil servant, cabin passenger
Final intended destination: Columbia. Last residence: Foreign Office, London, England.