ILR stamp in passport

[newperson]

I'm going to the PEO next week for ILR. I have two citizenships already, although both non-EU. One Commonwealth, one not. All my dealings with the UKBA have been on my Commonwealth passport so far.

If they do grant ILR, can I ask them to put stamps in both passports if I bring them along with sufficient photos? Is that something they will even do? I can't imagine it would be too much work for them, but I'm probably wrong.

It just would make things somewhat more convenient. When I enter one of my home countries, I always have to use that country's non-Commonwealth passport. This way I can travel with one passport, not two.