Let's not forget the short tunnel was an electoral ploy by David Cameron, not a proposal by English Heritage, Historic England or The National Trust. The fact they are now pretending it will ENHANCE the World Heritage Site is to their shame. Oh, and that's despite UNESCO opposing it. Show me a country that defies UNESCO regarding the care of it's World Heritage Site and I'll show you a country that has no better standards than a banana republic.
(I feel better now. This is a very simple issue....)