Below is a description of the situation in question and my view of it. I would be grateful if someone could try to shed some light on the situation.
This message is quite long but I hope this will not put you off!

Here's the story: me and my Filipina girlfriend both work in a nursing home in London. She holds a tier 4 student visa and works between 30-48 hours a week (36 on average). Most of the other students who work for our company also work in excess of their permitted hours.
Just a week ago our workplace was visited by a UK Border Agency official. Also, thanks to a tip-off from a mutual friend of ours, we learned that another nursing home, which is also run by our company, was targeted at the same time.
The purpose of both visits was the same: examining students' files. Our manager was cooperative and a person from our Head Office was also called in to handle the situation. Having rifled through the students' files, the UKBA agent left the premises.
Just two days after that incident, our manager asked a number of our colleagues, all of them tier 4 students, my girlfriend being one of them, to bring their passports and visa-related documents to him so he can photocopy them. Surely this has something to do with the visit by the UKBA. I've been doing a lot of digging, trying to piece all the facts together and get a clear picture of the situation. One of the things I've come up with is: http://www.ukba.homeoffice.gov.uk/emplo ... ost280208/
These sections are of particular interest:
1. "Under the 2006 Act, you are are liable to payment of a civil financial penalty if you employ a person (...), or who works for you in breach of their conditions of stay in the United Kingdom."
2. "Whilst the 2006 Act makes employers liable to civil penalties for employing illegal migrant workers, it also allows employers to have an excuse against payment of a civil penalty for doing so. Employers can have the excuse by carrying out specific checks on the original documents of prospective employees. Employers will only have the excuse for employees with time-limited leave to be in the UK if they carry out repeat checks at least once every 12 months."
So, in light of recent events, it would appear that our employer was issued with a Notification of Potential Liability (or a warning maybe) for employing illegal workers, hence the sudden decision to have their documents copied - in an attempt to have an excuse against paying the fine.
But this is the employer's problem. What concerns me is: what will happen to those students who were discovered to be working in breach of their visa conditions?
Another thing I've found are enforcement guidance documents:
http://www.ukba.homeoffice.gov.uk/sitec ... iew=Binary
Scroll down to chapter 31.8. - visits to places of employment - which says: "Before visiting places of work, try to establish the names of offenders and undertake pre-visit checks (see chapter 31.3). Try to enlist the co-operation of employers in identifying employees who may be immigration offenders (...)
So, again: what hope is there for the students to get away with this? Will they be let off with a slap on the wrist, our employer being the only one to face the consequences? Or will the UKBA send enforcers to arrest my girlfriend and the others and then deport them?...
OK! What do you guys think about all this? How bad do you think the situation is? How worried should we be? Just please be honest with us...
Thanks in advance! Any help will be appreciated.