I don't think it will take legal challenge or other environmental protest to see that this runway never gets built. Whatever a gullible Parliament and Regional Airport consortium was led to vote in favour of, it is now more than ever apparent that that R3 is a preposterous idea with no sound business case. There are alternatives which provide much better value for money. If even the FT thinks so then why on Earth is this thing still being talked about? A heavily indebted owner which is paying out more in dividends than it is earning doesn't sound like a safe pair of hands to be embarking on such a venture in any case.
https://www.ft.com/content/98e6b128-...1-31da4279a601