Lord Swaraj Paul also was born in India. That doesnt make the cut.
I have tried for it on the net. It was no where mentioned that he still holds the pakistani passport. However I found this on the net.
http://en.wikipedia.org/wiki/Order_of_the_British_Empire
You might want to take a list of these honorary british knights.
http://en.wikipedia.org/wiki/List_of_honorary_British_Knights
In this Pervez doesnt figure.
Pakistan after 1947 never had Queen as Head of State. Basically after 1947, whoever Pakistani got this award can get this award, but cant call himself "Sir".
But the bestway group's officially states his name as Sir Anwar Pervez OBE H Pk.
http://www.bestwaygroup.co.uk/default.aspx?id=382902
So he definitely has british citizenship. Whether he still holds a Pakistani citizenship, I dont know. It depends. However, it all depends whether Pakistan has dual citizenship, when was it started and the most important thing-whether Pervez has it. So basically,
i) British Citizenship-yes
ii) Pakistani Citizenship - dont know.
So, in the interest of dealing with only facts, let us not consider him for counting him under Pakistanis.