Lol, I honestly didn't expect to get this much of a response, and especially over mobile phones.

I'm a country girl myself. I've never even ridden in a Subway/Tube before. So I honestly had no idea about the phones, and I am sorry for not thinking to check.

I actually had not had this prewritten, but actually wrote it off the top of my head when the idea came to me, and it was silly, I looked up rather or not the Tube would still work if the power was cut, but not if the phones would work. But still that could be dangerous yeah, do they have an emergency phone on the cars incase they need help from the station?

Anyways though the two main elements were isolation and the birthing. So anyway that you want to do it where John can still talk Sherlock through it is fine by me. Tube, Train, or Lift its all good.

Sorry again for not checking. Will be more careful in the future.