London to Croydon via Folkstone and Dover

The information board at Charing Cross seemed to think my train would be stopping as follows:

Waterloo East
London Bridge
New Cross Gate
Brockley
Honor Oak Park
Forest Hill
Sydenham
Folkstone Central
Dover Priory
South Croydon
Purley Oaks
Purley
Reedham
Smitham
Woodmansterne
Chipstead
Kingswood
Tadworth
Tattenham Corner

Now, that's an impressive detour!