wrote:
How much of this still exists in some form? I believe the 405 to
Redhill and the 409 to East Grinstead as they are now were once part
of it, but what else is there?

246 to Westerham
402 to Sevenoaks/Tunbridge Wells (though not a TfL route)
Most things that still have Green Line branding (Windsor, Hemel
Hempstead - are there any others left apart from the Luton Airport
service?)

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Current nearest station: