Helen To The Rescue

Was it Helen of the Tower Bridge?
Was it Helen of Troy?
Or was it Helen from the Crown Prosecution?
Who came to the rescue of the stranded young traveller?
Who had to dismount in Birmingham for the Queen?
Is it an open question or a closed file?
Which made this lad stay over for a while?
The story is not very clear.
All that I can say it was not "Julia Dear."
Thank you Helen of the Tower Bridge.
Helen of Troy.
Or just Helen from the Crown Prosecution;
Who rescued Billy from destitution!
Your name will go down in history.
For everything that you did for me!