Operator channel linkdoctor on the path of Google URLs

A post on this blog about Camidoc ranks somewhere on Google for queries about the doctors service in North London. A query on Google will redirect to a results page with the URL:

http://www.google.co.uk/search?q=camidoc&channel=linkdoctor%2Clde1000032

I find channel=linkdoctor an intriguing section of the URL. There is no indication on the page that Universal Search, or hyperlocal features are applied on the page on Google.

This might be an indication of future plans of Google to introduce Universal Search for the category “Local health services” or similar.