In message , at 09:57:58 on Sun, 1 Sep
2019, Marland remarked:

My London relatives who were around from the 1920’s generally called
it the UndergrounD and I of 1950’s vintage and generally still do.

Tube which has equally been around since
the early 20th century since it it started as a catchy marketing title was
generally thought to be the the deeper bored lines.
The distinction between the two seems have become blurred from about
the1970’s- 1980’s and has now become official.

The same period has seen many use Train Station instead of Railway
Station.

One if the worst offenders for "Train Station" are bus companies (the
bigger ones also train operators of course) in the naming of bus stops
and even painting on the side of a bus.

https://www.flickr.com/photos/132645374@N08/36278889712

--
Roland Perry