By Tim Hanlon A latest Omaze prize draw has sparked outrage as the £3million mansion is built on a UNESCO World Heritage site. The five-bedroom house is located on the coastline in Cornwall where the BBC’s Poldark was filmed and is right next to the Gooninnis Engine House in St Agnes. Used for tin and copper mining in the 19th century, the heritage site’s UNESCO status put it on par with iconic places like the Taj Mahal, the Pyramids and Stonehenge. Officials from the Cornish Mining World Heritage Site objected to the mansion being built, warning “the harm caused… cannot be mitigated by design…