Do you really think I would be able to find government statistics from a few years ago?
Around half of that number are what can be called "soft" radicals.
You now, de-legalization of homosexuality, total control of the husband over the wife etc. The other half of those are more like "support ISIS" radicals. Most of those are from the middle east, Africa or south Asia, not from first world countries.
If you want other interesting numbers, half of the Muslims living in GB are of the belief that gays should be put in prisons, 1/4 wants Sharia Law, and 4% outright support suicide bombings.
Those are really easy to find thou, so you should have no problems with that.