An application for a replacement BRP must be submitted within 3 months.
If the BRP was lost or stolen outside the UK the visa holder will need to apply for a ‘replacement BRP visa’ in their passport first to re-enter the UK, and then apply for a replacement BRP within 3 months after they return to the UK.
Lost or stolen passports
If a passport was also lost or stolen this will need to be replaced before applying for a ‘replacement BRP visa’ to return to the UK (outside the UK), or to replace the BRP (in the UK).