Many thanks to BFK, theog, and gregrocker for all your ideas. Apologies for the delay in responding but had some distractions.
Did as suggested in BFK's post (#6) and after three runs of the Startup Repair am now booting into Windows 7 and Disk 0 shows Healthy (System, Boot, Page File, Active, Crash Dump, Primary Partition).
However I now have another problem - cannot see any of my emails in Windows Live Mail nor can I access any new mail, although I can see and read it on my ISP's web server. When I set up WLM I did alter the location of the Store but at the moment cannot remember exactly where, but almost sure it was a sub-folder of Data Files folder on M: drive!!! I am wondering if changing to Single Boot has affected WLM in some way, as I notice that BCD file shows one entry in the Windows Boot Loader as: -
"description Windows 7 Home Premium (recovered)"
Why "recovered"? Any thoughts please?