On Sep 17, 1:20*pm, Sim wrote:
They prefer S-
Bahn and U-Bahn, we prefer Overground and Underground. Both are clear
enough for me.

And there are odd examples. In Hamburg, there is a large section of S-
Bahn that is underground, and a large section of U-Bahn that is
elevated (hence Hamburger Hochbahn AG - the overhead railway!).

Neil