His birth index:

First name(s) MICHAEL T
Last name BALSOM
Birth year 1945
Birth quarter 3
Registration month -
Mother's last name BENGER
District HAMMERSMITH
County London
Country England
Volume 1A
Page 190
Record set England & Wales births 1837-2006
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His birth certificatge:

District: Hammersmith
Year: 1945
Cert No: 152
Name: Michael Terry
Sex: Boy
Father: Albert James Balsom
Mother: Stella Selvina Priscilla Bsldom formerly Benger
Father job: Motor Van Driver of 102a Larden Road Hammersmith
Informant: S Balsom mother 102a Larden Road W3
Info date: 11 Jul 1945
Registrar: E Clark Deputy Registrar.

It remains unusual that he was born 14 years after his parents married with no earlier children.  Might his parfents have been abroad?
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There is one marriage on the indices which could be his, in 1969 in Eealing:

First name(s) MICHAEL T
Last name BALSOM
Marriage quarter 1
Marriage year 1969
Registration month -
MarriageFinder™ MICHAEL T BALSOM married
PATRICIA BULL
Spouse's last name BULL
District EALING
District number -
County London
Country England
Volume 5B
Page 76
Record set England & Wales marriages 1837-2008

But no children found
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No death found, unlikely though.
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