student visa

My friend and I would like to travel to Paris, she is on a student visa and she dropped out of college when they failed to offer a course she registered for. her visa is still valid till december. do you think they can deport her when we get through immigration @ heathrow airport coming back from paris?

Do you think the colleges notify the home office when student stop attending? Can the home office know she is violating her student visa?

She is planning to return home when her visa runs out in december so we want to do a bit of holidaying every month from now before she returns home because there is no way she can get an extension to her visa.

Worried friend