The owner of the Scarrott family tree that confirmed the final details for me believes the male voice is Aileen's husband Harry Scarrott.
She was not previously aware of the recording but had named her daughter Rhiannon after the song. Once she heard it the voice reminded her of when she had met Harry as a child.
She was going to see if her father had a photo of Harry and Aileen. The photo she had on Ancestry was of Harry's previous wedding.