The majority of Indian restaurants in The UK are run by Pakistanis.. (In Yorkshire and Manchester anyway)
No they are not, the majority are run by Bangla Deshees or of Bangla Deshi desent. And there is a difference between Pakastani and Bangla Deshi meals and specialties, as is indeed there is differences across the whole of the Indian sub-continent. If you are lucky enough to have a South Indian specialist restaurant, you try a whole range of dishes almost completely different from the largely generally available Bangla Desh derived dished in the UK.
Finally, I can't say too much about the Calis Beach Indian, the meals I have had there were so so. However the Shine in Hissy does its best to offer a range of curries and accompaniments that are as close to the curries we get at home from the local (Bangla Deshi) Indian, and I think on that comparison they are better than OK.
Finally in support of the Turkish Curry.. I love 'em. Yes they are not like the curries we get at home, nor indeed are they like the chinese or thai curries we get at home, but they are generally very, very tasty... and top of the 'Turkish Curry' league for me here are Frank Canons in Calis and the Kadianda in Uzumlu.