I've decided to write my own ending.
Matt came back for Jean. Together they build a chain of motels across the US and lived happily ever after.
The clippie's husband sent for her and she went to live in the US. He opened a garage, they had six children and lived happily ever after.
Helen's husband was killed. The Yank commanding officer went back to the US but soon realised that his marriage was over so got a divorce. He continued to live in the US until 1974 when he returned to the UK for the 30th anniversary of D Day, visited where the base had been and met Helen by chance. They realised they still had feelings for each other, got married and ...yes you've guessed it....lived happily ever after.
I love a happy ending lol.