Roedean has a number of girls from differing countries around the world but I wouldn't say there are a large number of Russian pupils? In fact, there were more Russian pupils at DS's school which in turn had a smaller proportion of foreign based pupils overall. You have to be up to a fairly high academic standard to join Roedean & so does it matter which country a pupil resides in anyway? As long as the school ensure integration for all, which Roedean do, I don't see a problem?
Nettle fairy, we used the school minibus service when DD was at Roedean. She was only there a year & had she stayed for A Levels, she was planning to use the local bus service. The day is long, but they have the weekend to recharge. DD was never overtired, whereas DS, who weekly boarded at another school, (obviously being a boy!), was always exhausted. His school day was actually shorter than his sister's! The good thing about the Roedean day is once they get home, there's no homework to worry about because they've completed this at school. DD never had a problem with being in the minority as a day girl & never wanted to board.
It is safe to say, it was a fleeting but successful affair with Roedean for us.