I'm sorry that it has taken me so long to reply, but my son and partner arrived from Perth
and as you can imagine I've been flat out.
Thank you so much Cando and Merlin for all that extra information, it is a tremendous help and when I have time to digest it all there won't be much that I won't know.
I appreciate everyone's help, there's no doubt Rootchatters are a wonderful band of helpers.
Many thanks
Joy