The "tunnel" (short, not long) will involve bulldozing new junctions, slip roads, and a brand new four-lane dual carriageway across ONE THIRD of the WHS causing massive destruction to the protected landscape. The "tunnel" (long, not short) or simply doing nothing ... wouldn't.
It's stating the obvious I know but whatever is done in the end will be first and foremost based on costs - not on what is the best for the site. I could understand it if the country was broke but millions of pounds are wasted every week by bungling bureaucrats, and the obscene plan to spend 25 billion pounds (and the rest) on upgrading the country's 'nuclear deterrent' just illustrates where the true priorities of those in power lie.We (as a species) need to make a mega mind-shift away from what we are told is important to what we know in our hearts is important. Things like proper care for the elderly, sick and poor, adequate protection of the environment and our cultural heritage - not bombing the brains out of people all over the place and planning to do even more of it with even bigger and smarter bombs.
Grrr... it's hot, but I feel the same way even when it's cold :-)