That death falls into the gap in the GRO indexes.
In FreeBMD there are three possible 1940s marriages in the region:
Chesterfield Dec 1943
Sheffield Sep 1944
Rother Valley Mar 1948 - and others elsewhere.
ADDED The 1948 marriage to Marjorie Marcroft gives one possible child registered JunQ 1949 in Rotherham. However it appears to have been registered twice, three pages apart.