You include any passports you have held since moving to the UK (I.e. if you have renewed your passport since arriving). You do not need to include any other old passports.
You should not include any old BRP cards, as you’re not really supposed to have any old ones still in your possession.
When you get the new BRP from this application, they will ask you to mail your current BRP back to them so they can destroy it… so when you do this, if you still have any old BRP cards from previous visas, I would mail them back too.
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