Here are the official figures...
http://www.statistics.gov.uk/cci/nugget.asp?id=273Here is another link
Total UK population
Asians make up just over 3.5% of the total UK population - about 2,084,000 out of nearly 58,800,000
Of these nearly 1.8% are Indian - 1,054,000
1.25% are Pakistani - 747,000
And just under 0.5% are Bangladeshi - 283,000
Or the ratio of Indians : Pakistanis : Bangladeshis = 10 : 7 : 3
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Distribution between the constituent parts of the UK
Well over 96% of all Asians in the UK live in England itself - over 2 million
Over 43% live in London and the South-East alone
Less than 4% (under 75,000) live in Scotland, Wales and Northern Ireland combined
About 2.5% (under 49,000) live in Scotland, 1% (22,000) in Wales, and less than 0.1% (2,500) in Northern Ireland
http://www.bl.uk/collections/business/asiandemographics.html