I disagree with your concept of Chinese takeaway & restaurants. I am a BBC 2nd generation. The first generation introduced Chinese food to the UK and it became what British people know of in terms of Chinese food. It is true that the western taste buds are slightly different from Asians, but I would disagree that the menu change. It is only because not many people have tried to step outside the comfort zone of what has ready been established by the first set of HK immigrants. Also, most Chinese takeaways and many restaurants owners had never worked in a restaurant or takeaway before coming to the UK. But to survive and make a living, their thought of bringing a bit of HK the British people would accept. Therefore, if there are HKers that are in the restaurant industry in HK that the food is good, then there is no reason why they won't succeed in UK. however, they may need to tweak the way of some of the dishes to suit the British palate. Maybe, a promotion tasting to see how people or local would take the food. I can tell you BBQ style restaurants rather than hot pot would have a market for provided it is tasty. UK has many Japanese, Korean, Brazilian, even Kebab style BBQ's, therefore Chinese style 串燒 BBQ I believe would have a good market in the UK. Hot pot not so many, the concept of everything cooked in one pot, all cooked to the same favour is something westerner don't enjoy much. There is a Hot pot restaurant in UK but mainly catered for Asian not British. HKers need to think about marketing and promotion, sample tasting and market research is a must if HKers want to see if they are a market for the type of food you want to sell and be flexible to change or adjust the taste. The new hker immigrants should think more creatively, as that is what will help them to integrate into British society. Also, takeaways earn more in less wealthy areas than in wealthy areas, especially if you follow the typical Chinese menu. The reason is, many families are willing to buy takeaway than to make dinner. While the wealthier areas are willing to pay for a restaurant meal.