If you upgraded the catalog from your previous version during installation of PSE11 your tags for People, Places and Events should have been imported.
You can continue creating new keywords and assigning to one of those three categories.
Also you may need to adjust your settings. From the media browser, make sure the tag panel is selected rather than information and then click the menu:
View >> Show People in Tag Panel
Thanks for your help.
My problem was that for some reason I was unable to drag/drop tags from the new People tags area onto images. As these tags are not specifically used in the brief video tutorial provided, and they are now in a separate 'box' I assumed incorrectly that this was normal , hence my frustration.
Having tried again, they now appear to be working as intended, so my query is irrelevant.