are you certain you have correct y.o.b. for George?
there is on FreeBMD
George Stringer Mar qtr 1917 mother's maiden name Mannion Keighley 9a 253
and a death reg which seems to fit this George
George Stringer born 16 Dec 1916 death reg Jun 2000 age 83 Keighley B42C 081B 43
Suz
This George and the other Stringer/Man(n)ion children whose births were registered in Keighley district from 1914 onwards are likely to be the children of James Stringer and Rose A Manion [sic], married in Keighley district Dec qtr 1913.
In case these turn out to be your people, their death registrations appear to be as follows:
James Stringer aged 49, Dec qtr 1938 Keighley 9a 263
Rose A Stringer aged 72, Sep qtr 1961 Worth Valley 2c 44