UK Oil and Gas Industry

I have been told that Aberdeen has the highest percentage of Nigerians of any place in the world outside Africa, but we have a real problem in Aberdeen with the visa system. When people come over for university and things like that, actually staying afterwards is very difficult for them. I find the visa system incredibly obstructive for my Nigerian constituents. Does the hon. Gentleman think that the flow of information and expertise would work better if the visa system was a bit more flexible, allowing people to develop their expertise in Aberdeen before going back to Nigeria?