After years of trying to figure this out, the name of my "potential" father has been thrown out in a random conversation. Problem is it seems that the man in question was a Greek sailor in port for a short while.
Would there be any way to search for a Stelios Almandes (spellilng not certain) who was in port in Wallasey, Cheshire around November 1972 and spent some time with a Patricia Swift.