Train tickets in London - buy before we go?

[JenC]

There isn't a tube between London and Croydon, it is only a National Rail train. To clarify, travelcards and Oyster cards are valid on all of London's public transport network. Here is some information that will hopefully clear things up for you: http://www.nationalrail.co.uk/times_fares/ticket_types/46575.aspx

 

Assuming your partner will be using East Croydon station then she should be able to get her travelcard or tickets from there - it's a proper railway station. Make sure she ensures she does get on the quick train (stopping at only Clapham Junction between East Croydon and Victoria). There's also a not-so-fast one that stops at eeeevery stop.