Am trying to find info on an RAF pilot called John McDonald who married a Betty Harrison in 1946. He was already married and went to jail. I believe his first (legal ) wife stayed somewhere in Scotland. His parents also stayed in Scotland. Have met a total blank so far.
"England and Wales Marriage Registration Index, 1837-2005," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:QV8B-199R