I am resident in the UK with my wife and children. My wife is resident with a Student Visa (Oct 2023) and my 3 children and I came as her dependents in Dec 2023. But I switched from being a dependent on her Student Visa and acquired a Global Talent (Exceptional Promise in Science) in May 2024. I applied alone for a-3 year run, hoping to apply for Indefinite Leave to Remain after spending a continuous period of 3-years in the UK.
Considering the fact that my wife is currently on a PhD, I will not be able to switch her to GT visa as a dependent until after 2 years into the study. A wise thing to do is to switch her and the children at the same time. By the end of her second year into PhD, that is, October 2025, I will have spent 1 year 5 months in the GT visa. They will then have 1 year 7 months to stay on GT before I apply for my ILR. They will need an extension of 3 years 7 months to complete the 5 year requirement if her time on student visa will not count toward ILR.
Considering the financial requirements for switching them and this back and forth… I have these questions to ask and need counsel.
1. First, I want to know if all the premises I stated above are correct or I have got anything wrong so
far?
2. Will I be applying for British Citizenship at the end of the 4th year, that is, 1 year after ILR or at the
end of 5th year, which is 2 years after ILR?
3. Will it be possible for my family to join me once I have ILR or when getting my British citizenship
without having to switch their current student visa? I heard someone say that I can bring them on
appendix FM……. Is there any way I can avoid switching them and still settle within the shortest time?
4. What will be the shortest and most cost effective route for them to settle?

Thanks in advance.