India is the most common country of birth among the foreign-born. Despite that, all Brexit debates focused on immigration from East Europe. For example, the web is full of charts and graphs about immigration figures from countries like Poland, Romania, Hungary or Bulgaria.
It will be natural to assume that one major aim of Brexit is to develop a modernised version of the Great Empire, wouldn’t it?
The International Passenger Survey estimates shows India as the top country for people coming to the UK with 11.9% of all immigrants. It’s followed by Pakistan, (5.8%), Poland (5.4%), Australia (5.2%) and China (5.2%).
Source https://www.theguardian.com/news/datablog/2010/jun/26/non-eu-immigration-uk-statistics