Well, that's the whole point of this thread, isn't it? It's exploring the idea of it being not "Indians" and "British", but "British" and "British" culturally and that overriding ethnic considerations.
That really was the point I made this thread.
So far we have attempts to create a mixed elite, with varying approaches, and a reference to the Taisho Government of Japan.
Though @Chazmo - the argument of a small minority preserving its culture from others without any exchange is proven false with two parts of British history.
1) Anglo-Saxon & Norman mixed to create English, and the Normans weren't exactly about to drown Britain in people. Eventually the French aspects merged into English - see the language, all our words involving power, and office have latin roots, high-culture have french roots, and homely words have german roots.
2) The modern British curry obsession, (and tea) - whilst there are plenty of 'British Curries' (for good or ill) there is still an intense love for good Indian curry. There probably other exchanges that existed, but I'm no great anthroplogist, and beyond adopting words, food, drink, and importing philosophies (Karma for example) I'm somewhat ignorant.