Many thanks Shed for that excellent write-up. Even those of us who were also present would be hard pressed to have remembered or heard all the details you have mentioned and reported them so clearly.
I like your own idea of asking Sir Humphrey to pay for the complex utilities work required before T3 could be expanded. To get some perspective, have we any idea just how expensive such a project would be? Are we talking millions, tens of millions, a hundred million or more?