Posted here with an eye on the cost and benefit. Would be very interesting to know how the costs are split between the loop, signalling, the new bridge, and perhaps other items not listed in this short piece.
I found a quote for the most recent
TWAO▸ , which is just for the six (or thereabouts) crossing closures, new bridge, and highway works - total £4.7M. I think most of the £60M is coming from the Port Company, so it's not accounted in the same way (though there was a ministerial order for a grander version of it earlier).
The trail start with
this more detailed page. It has a link to information on the TWAO within the archive, where there is the usual comment about "future migration to the new website". Is that actually happening yet, or are they still using this archive as bit of overspill space with poor links to it?