I might have missed some previous discussions on this subject, and my apologies if this has already been discussed ad nauseum, but when there is such a huge problem of congestion on Britain's roads and a lack of capacity on the railways, why was a high capacity freight line along the old GCR, linked to the Channel tunnel, with an extension to Birmingham not proposed? A high capacity line built to US loading gauge would enable double decked container traffic to be moved rapidly from Kent to Transfer sites close to the final destinations. It might also be possible to run double decker trains from Marylebone to Snow Hill along the same lines albeit at a slower rate.
Andy