cry87 wrote: ↑Sun Sep 20, 2020 9:12 pm
does the UK nationality preclude me from going down this route?
It very likely does, I'm afraid. There are two routes for dual nationals, and it seems you are not eligible to either:
1) Lounes route: for EU nationals who immigrated to the UK, exercised their treaty rights here, subsequently became UK nationals after exercising treaty rights in the UK, and want to sponsor a non-EU family member.
2) SS: for UK nationals who immigrated to another EU state different from that of their own nationality, exercised their treaty rights there, and want to come back with their non-EU family member with whom they have been living in that EU state.
But because you are a dual UK-French national by birth, if you only ever lived in the UK and France, then you have never lived and exercised your EU treaty rights in another EU country that is different from your country of nationality, and this makes you ineligible for either of the options above. If you had lived with your partner in another EU country different than France or the UK, say, Germany, then you could use SS to come to the UK, since you are not a German citizen.
And if so, would it benefit me at all to not mention the UK nationality in my application to the home office?
[face palm] You cannot simply "not mention" that you have UK nationality. First, because you would need to lie on your application, since the question is specifically asked wether you have any other nationality; and second... because they will find out!
I'm afraid it looks like the route for you is the classic route of parter of a British citizen.
My posts express what I believe are the facts, based on the best of my knowledge, about the topics discussed in this forum. They do not constitute immigration advice.