Gigabit
Member
I am not sure they'd want to pay for anything more than they have to. If it's above ground and outdoors, they'd be happy to rely on whatever coverage there is. Of course that leads to the obvious problem of coverage blackspots, especially with some of the old station construction materials and corridors/tunnels etc.
The best they could/should do is allow access to their property to add small cells or whatever, but that would likely be separate to the company rolling out dedicated equipment within stations. I see how that might seem confusing, but the two things are separate - even if a phone user, hopefully, swaps from one to another without issue.
I don't see why it should be separate. Just use the same equipment they're using in Underground stations, above ground.