On 9 Mar, 21:40, Edward Cowling London UK
wrote:
Wikipedia does says it's normally called plain old Letchworth, so I
wonder why the train announcement changed ? Perhaps the great and the
good of Letchworth got jealous of Welwyn ? :-)

Locally everyone refers to it as just "Letchworth", whilst in the case
of WGC the full name is normally used. I've always understood this to
be because there is a separate village called just "Welwyn", therefore
the name WGC is used to avoid confusion.

Apart from maybe a few purists, nearly all of the population of
Letchworth call it just that.