[From The Times report on this study]
The 40,000 families included some 10.000 individuals of ethnic origin.
It is sometimes asserted that Pakistanis associate more strongly with their ethnic group than with this country, but the reverse is actually the case.
Every minority group scored more highly on the scale of 0 to 10 question of how important being British was to them, than their white British counterparts did.Black African Muslims scored highest at 8.2 out of 10. The white British scored 6.6
People over 60 felt more British than others, but there was a reduced sense of British identity in people with a college or university education.
My comment is that British people in England commonly identify themselves as English rather than British but ethnic minorities are inclined to define themselves as British, not English. This, to some extent, may explain the lower 0 to 10 score.
Interesting to see what treatment the Mail gives this. Probably they'll imply that the study's authors are left-leaning, notorious activists for Muslim causes or some such!