By not deporting those students UK risk its image.
Those kids would become a hot cake for media.
This will not be in UK's interest, so as I know of UK they will never do this mistake for allowing those to mix with public.
I doubt if they would be even allowed to go back to collect their belongings.
Although those students were innocent but Pak. govt. should also share the responsibility of the out come.
Local embassies never mix up with expatriate Pakistanis. OPF in Pakistan need to brief about the foreign culture to those youth travelling to UK.
If we see our old passport it is written that it is an obligation to register your self to local embassy, when you plan to stay more than 3 months. but imagine how many of us do this?
My advice to all Pakistanis, inform your local embassy even when you are out for a week's trip.