Zone UK is now called UK News in CSS

Fixes the colour of the UK News section title (should be red).

Examples here: http://m.guardian.co.uk/uk-news/2013/jul/15/spy-home-office-children-peter-francis
and here: http://m.guardian.co.uk/uk-news/

![skating and flying](http://i.imgur.com/4R6ukNy.gif)