Loop line to connect British and Irish cities

If we had any doubt about the UK's lack of coherent high speed rail planning, the country has been unable to connect its existing high speed railway line HS1 to the new HS2 line it is building.

But now along comes Chris Williamson (who is President of RIBA, so ought to be serious), and proposes a ring railway line connecting British and Irish cities. Suggesting one route across the Irish Sea is not enough - he instead proposes two. And the lines in between would be on elevated stone viaducts.

The idea is supposed to "inspire" and "provoke" according to this De Zeen piece, but all it managed to provoke here was a groan. You spent time on this?

Why not propose to teleport people to Dublin while you're at it?