The Guardian has produced this ICM poll.

As anybody with more than three functioning brain cells could predict, a small percentage of Muslims believe (or say they believe) that the bombings were justified - and, even, that more would be justified.

Add just a couple more brain cells and you can do the sums: in a country with 1.8 million Muslims even a small percentage is still a lot of people.

So we’re informed that 63% per cent of Muslims had considered leaving the UK in the wake of the bombings. Big deal. If that figure is true, I reckon it’s at least as representative of the UK’s population overall as it is of British Muslims. I’m sure 63% of the entire UK population has at least once considered life abroad before. I have; every time I see Blair on television I reach for my passport.

Much more worryingly though is this:

A small rump, potentially running into thousands, told ICM of their support for the attacks on July 7 which killed 56 and left hundreds wounded - and 5% said that more attacks would be justified. Those findings are troubling for those urgently trying to assess the pool of potential suicide bombers.

Drawing on those additional brain cells, if there are 1.1 million Muslims over the age of 18 (as The Guardian says there are) then 5% is over 50,000 people. If just 1% of that 50,000 is actually prepared to involve himself directly in attacks on the British public then we have at least 500 people walking around willing to commit murder and mayhem in the UK.

And that is seriously bad news.

One in five polled said Muslim communities had integrated with society too much already, while 40% said more was needed and a third said the level was about right.

I wonder what ‘too much’ means - and how they came to that conclusion? Are these conservatives who regard not wearing a burka as integrating too much? Or simply moderates who regard drinking and fornication as integrating too much? The 40% offer some hope for the future. British Muslims will always be better Muslims than foreign, non-integrated ones.

More than half wanted foreign Muslim clerics barred or thrown out of Britain, but a very sizeable minority, 38%, opposed that.

Thrown out just for being foreign? Maybe British Muslims feel that way because, first, they recognise that the uncompromising violence that some of these foreign imams bring with them is not only objectionable but it’s getting them a bad name; and, second, perhaps they recognise a need for a British Islam - as opposed to an Afghani one or an Iranian one.

It does seem that there’s a polarisation - and a huge gulf - between those that emphatically reject violence carried out in their name and those that support it. The latter are very much the minority but, worryingly, they still represent a substantial number of people.

Keeping the cheerleaders to and organisers of terror out of the UK has got to be the government’s first major step.

So - do we know if this chap is still scheduled to visit our green and pleasant land?