Michael Hopkins wrote:

Will it serve terminal 4? What happens when terminal 5 opens?


It will not serve Terminal 4 at the start. When T5 opens, it WILL serve
T4, with HX serving T5. HX will then not serve T4, just T5. At least I
believe that to be the case.


Will it operated by HEx or First?


A joint operation I think, but are the 360/2 fleet owned by BAA?

I don't know much else about it, including any of the other questions.
And there is a severe lack of information about it on any operator's
website, as far as I can see.