I have visited the Grimsby Library today. This is what I have found.
HUGHES - On December 18, 1946, James Mason, aged 53 years, the beloved husband of Eveline Hughes, of 20, Shaftesbury Avenue, Grimsby. Interment Scartho Road Cemetery, Friday 3.15 pm.(20.12.1946).
Grimsby Telegraph 19.12.1946
Mrs E Hughes and Family of the late J. M. Hughes, of 20 Shaftesbury Avenue, Grimsby, wish to thank relatives and neighbours, the members of the L.N.E.R. staff, for the sympathy and kindness and beautiful floral tributes in their sad and sudden bereavement, also the staff of the Scarthoe infirmary for the kind attention given, and Kettle Ltd., for excellent funeral arrangements.
Grimsby Telegraph Monday 23.12.1946
They moved to Shaftesbury Avenue about 1938/1939, according to the electoral roll.
I could not find any record of Evelyn's death locally.
I went on to Family search and found the following:-
James Mason Hughes
England, Cheshire Bishop's Transcripts
Name James Mason Hughes
Event Type Christening
Event Date 24 Aug 1893
Event Place Witton-cum-Twambrooks, Cheshire, England
Gender Male
Father's Name William Henry Hughes
Mother's Name Annie
James M Hughes
mentioned in the record of Parkinson and James M Hughes
Name James M Hughes
Event Type Marriage
Registration Quarter Oct-Nov-Dec
Registration Year 1916
Registration District Wirral
County Cheshire
Event Place Wirral, Cheshire, England
Spouse Name (available after 1911) Parkinson
Volume 8A
Page 795
Line Number 147
James M Hughes probably married one of the following people
Name Evelyn Parkinson
I hope this helps.