London Gazette 17 Nov 1980 gives address at time of death as 1 William Pitt Avenue, Deal, Kent, Widow.
Entry at https://probatesearch.service.gov.uk reads:
Minter, Florence Alexandra of 1 William Pitt Av Deal last seen alive 2 November 1980 dead body found 4 November 1980. Probate Brighton 27 November 1980 £6,456.