Good timing, because in about 1 hour from now, at 14:00 BST / 13:00 UTC (as if there were such a thing as British Summer), the London Black Cabs will stage a protest that will gridlock London. Not that anyone stuck in London traffic will be able to tell the difference.

Article from the Beeb: http://www.bbc.co.uk/news/technology-27783218

edit: DST is hard