Looking at the TfL fare finder, there are now three entries for Farringdon.
Farringdon LU
Farringdon EL
Farringdon NR
All three show the default fare as being LU mode, but change at London Bridge (it assumes you’re travelling via New Cross Gate) as mixed mode when as far as I’m aware Thameslink between London Bridge/Elephant & Castle and Kentish Town NR is on the LU fare scale?
I use Forest Hill further down the line and I have to use the pink reader at Whitechapel (or Canada Water) to get the LU fare to Farringdon which isn’t mentioned for Surrey Quays.
