In message Jeremy Double
was claimed to have wrote:

A bathroom is a room with a bath... no ordinary members of the public
have access to trains fitted with baths in the UK.

That depends on where you're located, in the US a bathroom typically
means a lavatory (which may or may not include a shower or bath)

While this discussion is taking place in uk.* groups it's also in
misc.transport.urban-transit, so it's quite likely that one or more
members will interpret words based on local custom and not just one
specific region's definition.

In other words, you're both right.