If a Biometric Residence Permit (BRP) is lost or stolen, this must be reported to the police and the Home Office. The Home Office will contact you within one working day of reporting it.
UK Visas and Immigration (UKVI) are replacing physical visas (BRPs) with an online, digital record of your immigration status called an eVisa by 31 December 2024. It is therefore not possible to apply for a replacement BRP, and instead you will need to create a UKVI account and access your eVisa.