Are you sure of the date of birth, because there is a death in 1996, which is close to the particulars which you search for.
Civil Registration event: Death
Name: THOMAS, Gordon Herbert
Registration District: Canterbury
County: Kent
Year of Registration: 1996
Month of Registration: September
Date of Birth: 29 December 1924
District No: 5601A
Reg No: A15S
Ent No: 084
DOR: 996