PAULTON, ENGLAND - APRIL 26:  A sign warns of danger on a fence surrounding land that is being prepared for new houses to be built on a brownfield site close to the greenbelt of the village of Paulton on April 26, 2012 near Bristol, England. Figures released yesterday showed the UK's economy had slipped into a double-dip recession for the first time since the 1970s and the decline was led in the main by a slump in the construction industry.  (Photo by Matt Cardy/Getty Images)