So we are talking about net migration - so this is everyone including students, visa's, job migrants etc - people coming in and out. This is nation wide and probably not concentrated to a particular region or area - without further research it would be difficult to give an accurate answer. But it would be plausible to assume that majority would be here not to settle, but to study/work. From the same govt website - Study remains the most common reason stated for migrating to the UK.