Okay let me get this right in case I have missed something.
They came here pretending to be students having arranged with a fake school to back up their story.
So let's stop talking as though they are innocent victims. They were already criminals on that basis alone. Since they were only pretending to be students I assume they had no plans to go home after. So either they didn't expect to survive the attack or they had some other plan to break our laws.
Of course by planning a terrorist attack they have won the right to stay here forever so quite a good result for them I suppose and an inspiration to others.
Now some of you are saying that we had to obey our own laws in this. Of course we did. That part is correct. However some are saying 'isn't it good that we HAVE a law that protects terrorists from being sent home' and that is another matter entirely.
I don't even know if they would be tortured back home, but if so it wouldn't be for being Pakistani citizens as they have lots of those already. It would be because they had planned terrorists attacks. Against us yes, but not tortured for our benefit. For the protection of their own country from crazy murdering criminals.
Now I happen to think that a nation such as Pakistan has the right to pass it's own laws and enforce them as it sees fit. I personally may not like them, but I don't have to. The implication of some posts seems to be that Pakistani law is inferior to British law. That could be another thread really as it seems to reflect prejudices from the old days of the British Empire when we taught the 'uncivilised' countries how things should be done.
"Well they are like children" some would say. "Someone has to tell them what to do"