You have to have as many defences in place as you possibly can. But even then of course - and it's important to stress this - you cannot guarantee being able to prevent every attack or every kind of attack.

Britain does not normally these days play a huge part in peacekeeping.

The British retreat is over and now the advance will begin.

When we have a Deputy Prime Minister who tells people not to drive cars but has two Jags himself, and where the Minister who tells people not to have two homes turns out to have nine himself - no wonder the public believe politicians are hypocrites.

Where defining foreign policy as 'ethical' went wrong was that it implied that all decisions would be exclusive in every respect of any dealings with unethical regimes.

When we said that no more areas of power should go to the EU we were right. And now thanks to the European Union Act 2011, by law that cannot happen without a referendum. And we are just as right that the EU has more power in our national life than it should, and I believe as strongly as I ever have that when the right moment comes this party should set out to reduce it.

In my view what you can't argue for is a system that is neither decisive nor proportional and can be indecisive and disproportionate at the same time.