Re: Getting out from under.
That wouldn't apply here as this a clear breach of contract.
The kind of case that TTIP wants mediated in smoke-filled rooms are when councils or government decide something is a public resource. Examples of this would be the various "recommunalisations" of utilities going on in Germany, especially those around deals with juicy fixed profits like in Berlin.
An equivalent for the UK would be the contract for the new nuclear plant: under TTIP this piece of crap would be extremely expensive to repeal. Or any of the "heads I win, tails you lose" public-private partnerships. I'm not averse to getting private money directly involved in public projects as opposed to bond financing but the final risk should be equally shared.