Actually I live in the UK, and its not snowing in London, it never did to the extent it did up north, mainly a coating and some ice which has since melted.
Furthermore the pic is featured in the Daily Mail.
http://www.dailymail.co.uk/news/article-1337088/TUITION-FEES-VOTE-PROTEST-Charles-Camillas-car-attacked-thousands-students-descend-Parliament.html
must be one of DM’s stock photos