"Our parents established beachheads in the cities; it is now up to our generation to move out of those beachheads and claim the rest of Britain as our own."
And via commenter Fellist, former Labour MP for Sparkbrook Roy Hattersley (see also this post) :
For more than 30 years, I took the votes of Birmingham Muslims for granted. The Muslims themselves I treated with more respect. But if, at any time between 1964 and 1997 I heard of a Khan, Saleem or Iqbal who did not support Labour I was both outraged and astonished.
My presumption was justified. It was the Muslim vote - increased by an influx of families from Kashmir, the Punjab and other parts of Birmingham - which expanded my majority from barely 1,200 to more than 12,000...
I always assumed that their mothers and aunts (often on instruction) voted the same way as their husbands.