ILR app as dual citizen (non UK)

[Trois]

Hi all,

I am preparing my ILR application and have a question regarding duel citizenship (both non UK). My UK visa and BRP are for one passport, which I will submit together with my application. Am I obliged to submit my second passport as well?

My first passport has all the entry stamps for UK, but my second passport has the Shenghen and other visas in it, yet I do not want to give it up. I wonder if they are going to inquire beyond entry stamps.

Thank you