Well 'grey'' I was not able to continue working on the PC until this afternoon and I have had quite an interesting time.
I plugged in the 'old hard drive' exactly as you told me but it loaded up very slow and I missed pressing delete so it went through the usual start up procedure. In the end windows could no load as I received a message as follows (Windows Root)\system32\ntoskrnl.exe
I turned the PC off and restarted several times and in the end I disconnected the 'old hard drive' restarted and I am back here now.
When I finally got into the BIOS it showed exactly as it had as I mentioned in my previous posting.