Mizter T wrote:

The NFM does not specify what ticket would be issued for journeys from
the south to Kings Cross Thameslink - I'd be interested to know if it
would be issued to KX Thameslink specifically or just to U1. Does
anyone know for sure?

At Gatwick Airport recently I purchased a single to King's Cross
Thameslink. The ticket stated that KXTL was the destination, and it
bore the words "Route Thameslink".

PaulO