She's ok.
ILR is granted after 10 years continuous residence. Once you have this then you are a de facto permenant UK resident. 5 years after this you can apply for naturalization.
Any threats therefore of deportation are baseless.
Jonathan.
This is almost right. I take it she was granted he ILR after being Married to her husband for 1 year. The rules are different for single or spouses. A person would normally have to have been here for 5 years before applying for ILR or 1 year after getting married to a UK citizen.
Now to put your mind at ease. Your GF should have had 2 visas, one is leave to remain (I take it she was married in this country), it's this one that is linked in with your situation and could have caused a problem. As she now has ILR you are laughing. The only conditions for this Visa is that she cant claim benefits nothing more, nothing less. She can work as much as she likes, see who she likes, be single, get married again the whole shabang.
The only negative is she could have claimed citizenship after 3 years of being married but as a single she would now (after divorce) have to wait the full 5. Unless you get married of course.
If your still worried then give UK BA (border agency) a call and they will put your mind at rest.