You’ve not been in London’s deep underground lines I take it? Some of the tunnels are so ancient and cramped that tall people can’t stand straight in most of th

You’ve not been in London’s deep underground lines I take it? Some of the tunnels are so ancient and cramped that tall people can’t stand straight in most of the carriages. As the article says there just isn’t space to add equipment. Same reason they’re struggling to add air conditioning to older lines - no clearance The recently built lines had 5G etc from the start. It’s not difficult when the environment isn’t constraining you. Even malls add indoor 5g these days