@cyclina1 my leave to remain will expire on 31/08/19 so I have enough time to wait for replacement.
I have a digital copy of my lost BRP which I can just print.

Set(O) Guidance notes say the following: The reasons for not being able to provide the original document must be explained in a covering letter. We are unlikely to grant your application without the original document. Doesn't the second sentence refute the first? "Write a covering letter but we will...

Hi, I lost my BRP on 19/07/18 while I was planning to apply for ILR on 03/08/18. The loss was reported to the nearest police station (in person) and then the home office online. While filling out the Set(O) form online, documents section requires the following: Evidence of immigration status in the ...