How to reinstate Contact Linking in Outlook 2013

For Outlook 2007 and 2010 there is an Option > Contacts > Linking > Show contacts linked to the current item

This has been removed in Outlook 2013, apparently because they have a new feature of Links when you are on People and the current view is People and then look at details. I don’t use that but and tend to use the List view which does not have the links. Also I have historic links, so wanted to reinstate links. Thanks to:

http://www.slipstick.com/outlook/2013/show-contact-linking-fields-in-outlook-2013/

Which I found via

http://www.outlook-tips.net/tips/tip-375-outlook-2007-contact-linking/

So steps copied from first of these are:

1. Regedit
2. HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\Preferences
3. Add DWORD: ShowContactFieldObsolete
4. Set to 1

That page also referred to a Group Policy registry setting. I did not have that on my machine, did not create it and found that the links were there anyway

To remove:

Set to 0, or remove the Key

Solved.