Apart from the East End immigrant populations of Bangladeshi's and Somali's, I have noted a phenomenal rise in Eastern European riders in the last couple of years.

(Any other bids for Cosmopolitan Route of the Year, anyone?)

Didn't note any difference as between likelihood of use of Oyster card though... I reckon your observation is about right, Barbara, both in terms of Oyster use and "Reader Clustering".

"The future is already here -- it's just not very evenly distributed" William Gibson