[Margaret Pilkington]

The perpetrator of this crime is Sudanese.
A migrant who CHOSE to come here. Took on British citizenship, them mows down the innocent people of the country he adopted.

It will take more than just shipping them out Cashy.
It will take the government to devise a properly formulated and policed border policy.
An immigration policy which is robust and looks into the past of every immigrant wishing to be allowed residence.
This must be backed up by legislation that permits removal of the citizenship (and any assets accrued whilst resident here)if it is proved that the terms of it have been breached.

Maybe making the UK a less attractive place to aim for....removing access to benefits, housing, making the incomers have health insurance too. Not allowing access to the NHS services until they have contributed for a minimum of two years.
Making it possible to move here ONLY if you have a job and a sponsor who will be responsible for the immigrants behaviour.
It should also be a given that immigrants should speak English.
These criteria would need to be rigorously upheld for them to have any impact at all.
Even if this were done, it would not deal with those terrorists who were born here.

My gut reaction is that the only safe terrorist is a dead terrorist.
I do not believe that a radicalised person can be de-radicalised...they may tell you that their ideals and values have changed, but NO....it is not proven.

As I said originally Cashy....this question tests the wisdom of Job.