“London has more Asians than West Yorkshire and the West Midlands combined. By your theory, it should be top of the list and it isn't.”
Not necessarily so, gromit. The figures used to compile the “league table” are percentages not absolute numbers. The “Top Ten” is as follows:
West Gorton, Manchester
Barkerend, Bradford
Newtown, Birmingham
Everton, Liverpool
Croxteth, Liverpool
Hockley, Birmingham
Tottenham, London
Smethwick, Birmingham
Whitefield, Bradford
Cheetham Hill, Manchester
Examination of those places will reveal that they are all inner city locations and all have a high level of immigrants (though not necessarily Asian) among their population. It probably (though not necessarily) follows that since those areas contain the highest proportion of offenders then a large proportion of offenders are immigrants.
But, of course, other factors should also be considered. Not the least is that immigrant populations tend to be more “clustered” than others and also the police resources devoted to the offence in question may vary from area to area. There is little doubt that in absolute terms “White English” is almost certainly the largest group, but I’m not really sure that this tells us much or that it helps at all.