Railway, Rail or Train Station?

Whenever the UK media use the expression "train station" these days, it is greeted with a torrent of comments that "railway station" is the correct UK usage. So where has this change come from?

This graph uses a count, per decade, from 1830 to 2000, of usage from the English newspapers of the British Newspaper Archive.

The raw data shows the adoption of "train station" from 1980 onwards, and particularly from 1990. It seems likely that people born between 1930 and 1980 are going to be the most resistant to "train station".

The Oxford English Dictionary has an intriguing quotation from The New York Times Magazine of 21 June 1981:

When was the last time you heard a young, rich-affluent-wealthy type use the phrase railroad station? Upper-class use is now train station.

Is this the reason that "train station" began to be used in England as well?

What happened in the 1980s?

The steep increase in references to "railway station" in 1986 is curious. Deeper research seems to indicate it's because of duplication within the British Newspaper Archive. The sudden drop in 2000 is either due to the removal of duplication or, more likely, the fact that many newspapers are not included after 1999.