MICHAEL FALLON:

Well, we all have to, I think, step back now and see and look very carefully at what has worked and what has not worked.

We have had seven United Nations resolution. Clearly, a nuclear program of this kind can't have been put together without access to the raw materials, the components involved, and indeed to the finance that you need to construct them, to put it all together.

So, clearly, the sanctions may have been breached, and we need to look at them, see where those gaps are in the sanctions, and whether a new resolution can impose a tougher regime on North Korea or indeed on any other companies and individuals, Chinese or otherwise, who may have been helping them.