Outlaw I so agree with Jamjar -- and I know you don't want to - but I think you are going to have to obtain the marriage cert in this case.
As you are looking at this case for a friend -- think of it as a good deed!!
(By the way you may not be able to find Rose Funnell in 1939 as she was only born in 1922 and may still be redacted unless info has been provided about her death - BUT she would have been old enough to have been working away from home, so may not be with her father.)
Frederick Funnell may have re-married and be with someone completely unknown to your friend - also we don't know his year of birth (unless I have missed something which someone has posted).