WebmasterWorld administration, engine, reported in a WebmasterWorld thread that he is now only seeing UK news at Google.com.
He said, in the past, when he wanted UK news he went to Google.co.uk, but when he wanted US news, he went to Google.com. Now, since he is based in the UK, he only sees UK news at Google.com.
Engine is a bit upset, adding, "Google has taken one of my toys away, and I want it back!"
Not every UK searcher is noticing this right now. It might be related to how Google is testing dropping the country filter search option - or it might be totally unrelated.
Forum discussion at WebmasterWorld.