I spent the last 15 years in London and I strongly disagree. Not only are foreigners judged (perhaps subconsciously) on how British they can be, where you came from initially matters a great deal as well, which is why I worked on loosing my Eastern European accent.

That being said, over those 15 years, I was only openly discriminated against once.

Naa, you're expected to queue.

if you go to the countryside, you will be treated as a rare and unusual person of status. but you still have to queue.