HiThe song about Eldon Square ain't in "Close The Coalhouse Door". I went to the premiere of this at the University Theatre, Newcastle in ?1971 and, somewhere, I have the songbook. By the way, the night I went was the day Sunderland won the FA cup - so another reason for mourning along the Tyne!
Alex was used for loads of dour TV programmes about the "Industrial North" as you say, SF. Probably most of the songs were composed specifically for the programmes and are lost, but you could try looking through his web site here
or e-mailing him.
Cheers!
Ian