Initially, I had a p[roblem with addressing e mails as when I hit the
"To:" button, I got an error saying that the address list was empty.
Having researched this,I created a workaround for the problem but the
underlying issue remains

When I press my Address button and look at the "Show names from the:"
dialogue,I get the following

Outlook Address Book
Contacts
Contacts

The second contacts in the list is the one that actually holds my
contacts so I have now set it to be the address list that is
shown/used first.

I cannot find any way to remove the first Contacts entry. In the
address book "Tools" option, I have removed it from the list used for
sending mail but it still appears in the drop down list "Show this
address list first"

Although I can now address properly, is there any way to remove this
second Contacts entry. I should add that I only have one contacts
folder in the folder list.

Peter