Gordon Brown

If you take energy and climate change, you really cannot deal with the problems with energy and climate change without European co-operation at a high level. If you take digitalisation, it's an obvious area where European co-operation can actually make a difference.

Between 1939 and 1945 you produced weapons and war equipment valued at thirteen billion dollars, 70 per cent of which you shipped to your allies. The same process is going on today in Canada's much larger and growing industry.