"Assuming when a first time would gain a block vote (similar to blacks voting by party 90+% in USA) then how long before other Muslim-rich cities do the same? UK cities of Birmingham, Blackburn, Bradford, Leicester, Slough, Luton, and Manchester all have higher percentages of Muslims. Do they already have Muslims in high positions? I'd think so."
http://www.pewforum.org/religious-landscape-study/
USA:
Christian 70.6%
Jewish 1.9%
Islam 0.9%
https://en.wikipedia.org/wiki/Demography_of_the_United_Kingdom#Religion
Christian 42,079,417 71.58%
Muslim 1,591,126 2.71%
Hindu 558,810 0.95%
Sikh 336,149 0.57%
Jewish 266,740 0.45%
Buddhist 151,816 0.26%
Other religion 178,837 0.30%
No religion 16,221,509 25.67%
https://en.wikipedia.org/wiki/Demography_of_London (2011)
White: British 3,669,284 44.89%
White: Irish 175,974 2.15%
White: Gypsy or Irish Traveller 8,196 0.10%
White: Other 1,033,981 12.65%
White: Total 4,887,435 59.79%
Asian or Asian British: Indian 542,857 6.64%
Asian or Asian British: Pakistani 223,797 2.74%
Asian or Asian British: Bangladeshi 222,127 2.72%
Asian or Asian British: Chinese 124,250 1.52%
Asian or Asian British: Other Asian 398,515 4.88%
Asian or Asian British: Total 1,511,546 18.49%
Black or Black British: African 573,931 7.02%
Black or Black British: Caribbean 344,597 4.22%
Black or Black British: Other Black 170,112 2.08%
Black or Black British: Total 1,088,640 13.32%
Mixed: White and Black Caribbean 119,425 1.46%
Mixed: White and Black African 65,479 0.80%
Mixed: White and Asian 101,500 1.24%
Mixed: Other Mixed 118,875 1.45%
Mixed: Total 405,279 4.96%
Other: Arab 106,020 1.30%
Other: Any other ethnic group 175,021 2.14%
Other: Total 281,041 3.44%
Total 8,173,941 100.00%
Christian 3,957,984 48.42%
Buddhist 82,026 1.00%
Hindu 411,291 5.03%
Jewish 148,602 1.82%
Muslim 1,012,823 12.39%
Sikh 126,134 1.54%
Other religion 47,970 0.59%
No religion 1,694,372 20.73%
Religion not stated 692,739 8.47%
Total 8,173,941 100.00%
Why was Sadiq Khan sworn in as Mayor of London in a Church of England cathedral?
'Assume': Where you make an ASS out of U, but not ME.