UK cuisine is largely international, with curry (for instance) being the most popular foodstuff in the UK, originating from Asia.
As Hungarian, Italian, Greek, Indian, French, Chinese, Vietnamese, Mongolian, and any number of other exotic food outlets are thriving in London, for instance, it would suggest that customer demand for these foodstuffs is enough to sustain business.
A large number of mixed Polish/Halal grocery shops have opened in areas of South London in recent years, catering to an increased number of workers and immigrants from the Middle-East and Eastern Europe.
The good old Fish'n'Chips shop is still going strong.
Many have expanded their menu to include kebabs - only fair, as kebab shops tend to sell chips too...
