@HSTEd
"Has anything emerged about the options for avoiding the NIMBYs in the Chilterns?
I seem to remember an option to spend ~£3bn simply burying the entire line inside the AONB in a continuous tunnel."
The hardline opposition largely located in Buckinghamshire will only go away if the threat of the line is completely removed from their immediate locality, ie. moved to someone else's backyard - a tunnel isn't acceptable because it involves huge amounts of spoil requiring removal and the anti-groups located in the Chilterns don't want their allegedly "quiet country lanes" clogged up with dumper trucks full of spoil for the next 5-10 years!
The anti-HS2 campaign has to some extent dug itself into a corner - some elements of the campaign are utterly committed to a single goal of sabotaging the concept of a new rail line - so much so that no other outcome will be deemed acceptable.
We'll know a bit more in a few weeks when the outcome of the Judicial Review (JR) becomes public knowledge - if (as I hope and expect) the JR largely endorses the government's decision to press ahead with HS2, whilst of course expressing some observations on how it could have been managed more effectively, this could signal a real turning point and encourage some more moderate elements of the anti-HS2 community to adopt a policy of constructive engagement, rather than the seeminly ubiquitous "head in the sand, over our dead bodies" approach exhibited to date - let's wait and see?