If your BRP card has been lost or stolen you will need to report it to the Home Office online. The Home Office will contact you within 1 working day to tell you if you need to apply for a replacement.
If necessary, you will then need to apply for a BRP(RC) replacement card within 3 months (or you may have to pay a fine or your visa may be curtailed). This process may take several weeks.
Alternatively, you can get a replacement card through a premium service centre within five days or the next working day, though the cost is considerably more.
If you have any questions you can email the International Student Advice team