Over the past week or so, I have been hearing chatter about a Google UK search shuffle of some kind. I did not see any forum threads in the discussion forums I track, until Gabs posted one in Search Engine Roundtable Forums.

The changed pushed many sites a couple hundred points down in the Google UK search results. But as of yesterday, many of those sites returned to their previous position.

Gabs said:

You can see some of the tweets on uk serps discussing the findings.

Forum discussion at Search Engine Roundtable Forums.