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North Korea Nuclear Test

I apologise to the hon. Gentleman if I stole his thunder, or his line; I recognise his experience on these issues. It is hard to answer the question whether the A. Q. Khan network made an appreciable difference to the time scale of what North Korea has been able to do. I can certainly say that the issue of that network and the supplies that it was putting out lends strength to our argument that this is something in which North Korea has been engaged for a very long time.