Hi
Freebmd has his birth
Births September qtr 1919
Semple Douglas mothers maiden name Amos Chipping Sodbury 6a 368
However, to find his marriage, you will need to search the full GRO index which is available at your nearest main library if you live in the UK. It can also be searched online if you have an Ancestry subscription or at
www.findmypast.com which is a paysite
Marriages for the late 1930's onwards are sparse on freebmd
This is probably his parents marriage
Marriages December qtr 1918
Walter Semple to Dorothy E Amos Chipping Sodbury 6a 553