After visiting Britain last year for three weeks with my English born and raised wife, my opinion would be that it has hardly turned into Hyderabad or Nairobi. But I did notice that many of the restaurants in London we ate at were run by east Europeans. And we noticed that many of the people behind the counters in convenience stores were from Asia. But we didn't see crowds of Koran-waving fanatics with blood-dripping scimitars.
One brother-in-law also pointed out on a long trip from Norwich to Aberdeen that a group of workers picking veggies in a field were most likely all from eastern Europe. But overall, after visiting England and Scotland, it didn't look to me that Britain was in near danger of becoming another Pakistan or some other mideast country. Even in London most of the people we saw in four days appeared to be, like my in-laws, average white Brits.
I think your observations are farily accurate - of every 100 people you encountered 93 of them would be white anglo-saxon celtic Brits and less then three muslims.
Of course there are pockets of racial density, just like when I lived in America and visited New Orleans for the first time, I was amazed that nearly everyone in the whole city seemed to be black!
Your post post neatly exemplifies the difference between actual experience and MSM spin. Hope you enjoyed your trip! :)