I have checked the electoral rolls for 10 Weelsby Street, Grimsby, from 1949 to 1965. the followng are all the names listed.
1949 - Alice S Johnson, Harry Francis Griffiths, Robert Hayburn
1950 - Alice Sibina Johnson, Harry Francis Griffiths, Robert Hayburn, Harry Gollings
1951- Alice S Johnson. Harry Francis Griffiths, Robert Hayburn
1952 - Alice S Johnson, Harry Francis Griffiths, Nellie Williams
1953 - Alice Sibina Griffiths, Harry Francis Griffiths, Albert Coswell
1954 - Alice S Griffiths, Harry F Griffiths, Elizabeth Cant, James Gibson
1955 - Alice S Griffiths, Harry F Griffiths, Jack Court, Y - Shiela Griffin (Able to vote after 1.10.1956)
1956 - Alice S Griffiths, Harry Francis Griffiths, Shiela Griffiths, James Leveridge
1957 - Alice S Griffiths, Harry F Griffiths, Shiela Griffiths, Kenneth Fenley, Mabel Whitelam
1958 - Alice S Griffiths, Harry F Griffiths, Kenneth Fenley
1959 - Alice S Griffiths, Harry F Griffiths, William Coppin
1960 - Alice S Griffiths, Harry F Griffiths, William Coppin
1961 - Alice S Griffiths, William A Coppin, Mabel O Whitelam
1962 - Alice S Griffiths
1963 - Alice S Griffiths, Arthur Hamilton, Jack Willis, Allan Biney
1964- Alice S Griffiths, Jack Willis, Allan Viney
1965 - 10 Weelsby Street not listed.
According to WWW.Deceasedonline.com Alice died on 17.10.1964 and was cremated at Grimsby Crematorium on 22.10.1964.
I can find no record on that site for Harry Francis Griffiths
I hope that helps