Evidently, people wearing these feature-blurring, flesh-colored masks (or are they stockings? We can't really tell) have been popping up at various high-profile events around London, from Wimbledon to Elton John's White Tie and Tiara Ball. They just sort of walk around without saying anything so know one knows who they are or what they're doing, but it's likely a bit of performance art from the folks over at Anonymous. The group is just starting to gain notoriety in the UK, so it makes sense that they'd be out generating publicity in London; they're also gearing up for another global Scientology protest on July 12.
We kind of preferred the old Guy Fawkes masks from V for Vendetta, though maybe Anonymous had to switch gears because Scientologists keep trying to buy 'em all up.