Haven't they just removed a perfectly servicable escalator (and paid a not insignificant amount to do that)?
Weren't there already F&B operators on the departures level anyway, before the work started?
Yes, but the location of that escalator is exactly where the security area now is. You couldnt put the security area there is the escalator had remained.
There were landside F&B yes, but the airport wants airside F&B after duty free. Duty free and new F&B will be, in effect, along the walkway which takes you to the south terminal, which will be much more open in the future. It would be great to share a drawing, but im not aware that one exists other than the handful of press articles on it last year.
Roughly, its going from this (green security, blue duty free, red escalators);
to this (green security, blue duty free, red lifts, purple new F&B)
(the sizes of these are a complete guess, but indicative)
Which airport are you saying is not using lifts for the primary vertical circulation?
Heathrow - which your post noted has 'extensive escalators'. See my previous point -
if you have the necessary space, escalators are definitely the best way of doing things. But BHX
does not have the necessary space.
EDIT
Actually, its easier than i thought. New security (green) is where Burger King, Frankie and Benny's, etc. were previously located (and, note, the escalators). Lifts have been installed roughly where Burger King was. Im going to guess that duty free stays broadly where it is, perhaps with a few walls moved around to get the right passenger flow (you come out of security somewhere close to where WH Smiths was, i think).
That would imply that the new F&B will go in the old security area. Plenty of artists impression drawings here;
Under current plans, up to six new F&B opportunities will arise airside at Birmingham Airport, with outlets ranging from 150sq m to 450sq m.
moodiedavittreport.com
(note the aircraft on the extreme left of that picture, which will help orientate!)