On 20 Apr, 12:39, Mizter T wrote:
I have previously come across this notion that Vauxhall is a valid
"London Terminal" for journeys from the West London Line, but I'm
really not convinced by it. I readily admit that I have not delved
into the mysterious depths of the Routing Guide, but this proposition
just seems to be pretty counter-intuitive to me.

Vauxhall is a London Terminal, but only if there's a valid route.
Which there isn't from Watford Junction - Euston is your only option,
which also excludes Shepherd's Bush.

All West London Line stations have Clapham Junction as a Routeing
Point, and due to zonal fares is acceptable as a Routeing Point.
Therefore all routes from Clapham Junction to London Terminals are
valid, which gets you to all former Southern Region terminals.
Willesden Junction is also a Routeing Point, which gets you to Euston.

U