[snip from wikipedia]
In England 40% of Muslims live in London, where they make up 8.5% of the population. There are also large numbers of Muslims in Birmingham, Manchester, Bradford, Luton, Slough, Leicester and the mill towns of Northern England. In Scotland there are significant Muslim populations in Glasgow (17667, 3.1%), East Renfrewshire (1897, 2.1%), Dundee (2846, 2.0%) and Edinburgh (6801, 1.5%). In Wales most Muslims live in Cardiff (11261, 3,7%), but there are also significant numbers in Newport (3492, 2.6%) and Swansea (2167, 1.0%). Muslims are concentrated in urban areas, where they make up 3.3% of the population; In rural areas the proportion of the population is less than 0.1%.
Muslim population in English local authority areas.The local authorities with a Muslim population greater than 10% are:
London Borough of Tower Hamlets 36.4% 71,389
London Borough of Newham 24.3% 59,293
Blackburn with Darwen 19.4% 26,674
City of Bradford 16.1% 75,188
London Borough of Waltham Forest 15.1% 32,902
Luton 14.6% 26,963
Birmingham 14.3% 139,771
London Borough of Hackney 13.8% 27,908
Pendle 13.4% 11,988
Slough 13.4% 15,897
London Borough of Brent 12.3% 32,290
London Borough of Redbridge 11.9% 28,487
City of Westminster 11.8% 21,346
London Borough of Camden 11.6% 22,906
London Borough of Haringey 11.3% 24,371
Metropolitan Borough of Oldham 11.1% 24,039
Leicester 11.0% 30,885
London Borough of Ealing 10.3% 31,033
Kirklees 10.1% 39,312