Reports of people and sometimes gangs of clowns terrorising children and members of the public have been reported recently:
http://www.courier.co.uk/Police-patrol-school-run-Tunbridge-Wells-clown/story-28029314-detail/story.html
http://www.dailystar.co.uk/news/latest-news/471381/clowns-terrorising-children-across-Britain-police-crack-down
http://www.mirror.co.uk/news/uk-news/first-picture-evil-clowns-stalking-6685486

Also happening in America:
http://moviepilot.com/posts/2340964?lt_source=external,manual

And, from around two years ago, reports of lone clowns spotted at night in Northampton and Mansfield:
http://www.belfasttelegraph.co.uk/news/uk/creepy-northampton-clown-terrifying-residents-by-standing-around-on-street-corners-staring-at-passersby-29584319.html
http://www.nottinghampost.com/Mansfield-Clown-sightings-Nottingham/story-20094985-detail/story.html

Really really bizarre, and while I'm not one of those people who finds clowns scary, there is something very creepy about this. Interesting how this has grown from small reports covered in local press to now being featured on national mainstream news.