[dzhiurgis]

Everything relating to public transportation will be the major pain point. It is heavily regulated, subsidised, unionised, etc.

London isn't able to replace ticket sellers with machines yet, so you can imagine how long it will take to replace the drivers. Alternatively, they will see this a profit eating activity and resist until the people wouldn't take it anymore.

[jeremyjh]

When I was in London in 2009 I bought metro and surface train tickets from a machine.

[dzhiurgis]

Humans are still an option. And there are few other roles that are redundant, but every two months workers strike to keep them.