No-one in the trust will hazard a guess as to when "London's lost route to the sea" might be fully reopened but three engineering and environmental studies have concluded it is viable.
Holding out hope, blind hope, blind trust, that progress will appear out of thin air for reasons noone really is able to articulate, that's not the answer.
One of the advantages of using mediation in a business break-up is that both sides can agree on choosing a mediator they can trust, and one who has no interest in the business, bias or prior relationship with either party to the negotiation.