You can dual-wield your passports

My wife and children have UK/US dual nationality, so we've run into this. What we do is carry both sets of passports, exit and enter the UK with British passports and exit and enter the United States with US passports. In our experience, the UK authorities don't care as long as you're legal and don't give you grief, and the US authorities will usually be dicks to you for a bit but they do eventually let you through.

That said, we're white. The position might be quite different if you're not.

You just carry both passports with you....

Carry them both?

Probably with whatever weapon you're licensed to duel with.

I think you use your us passport when leaving the us and your uk one when arriving at the uk. Full disclosure. I have never traveled internationally. Kinda curious about it since I am a dual citizen.

It's a trick question, dueling is no longer legal in the US.

How will they know? My mom does it all the time, no issues