As you may remember, the country is made up of four parts: England, Scotland, Northern Ireland and Wales. The biggest contributor is, of course, England. It brings the state as much as 86% of GDP, while the success of the other parts of the country looks quite modest: Scotland – 7.4%, Wales – 3.4%, Northern Ireland – 2.3%. But this is not surprising! After all, it is in England that London is located, which provides a significant part of the income.