I have an old expired passport with some PSW and UK student visas, which was included in my application for my original (current Tier1). That passport was expired at the time.
So I assume that only my recent/current passport (which was used to obtain my current Tier 1 visa) is relevant.
Though the guidance isn't clear
Sure - a previous grant of leave like 5 years ago, not sure if that's relevant.C6. Do you have any passport or travel document which contains a previous grant of leave or
which you used when you last travelled to the UK?
Thanks..