Should British leave the subcontinent

"The subcontinent" is India and Pakistan. The British left there in 1948. Should you mean Britain's exit from the European Union, the answer is that the exit has a firm base in Britain's deep-rooted reluctance to hand over its sovereignty to the EU's civil servants in Brussels. But from a purely economic perspective Britain's exit may not be a good idea, as the EU will very probably flatly refuse to allow Britain easy access to the European market while Britain in turn might block free traffic of goods, persons and services from EU into the UK. So the exit will probably in the long term hurt the UK's economic development.