OK - First of all, by evidence of all the answers to the main question I took t for granted that the issue was resolved - that's a good enough reason in itself to lock it down - but I am probably wrong!
Certainly if I had started the thread, I would consider the problem solved and if possible I would freeze it. It would still be there for all to view but accepting no more pointless input.
If there are any other issues, then perhaps it is good idea to address them in a new thread.
My main aim now is to try and prevent my inbox filling up with unwanted responses.
In other words I want to unsubscribe from the thread.
How do I do that - because I can't see how?