World Heritage Sites and property prices

References to research by property website Zoopla, showing property values in and near World Heritage Sites in the UK, can be found in the following media articles:

http://www.dailymail.co.uk/property/article-3320543/Buyers-need-fork-extra-80k-live-near-World-Heritage-site-cheapest-spot-remote-Orkney-Islands.html

http://www.westerndailypress.co.uk/Houses-near-World-Heritage-Sites-like-Stonehenge/story-28183729-detail/story.html