Jesus I wdnt ask any of us
by the sounds of it, we are all on the breadline and rooting around dustbins.
https://traveldudes.com/moving-to-gibraltar-from-the-uk-why-and-how/#:~:text=Residents%20are%20allowed%20to%20pick,savings%20interest%20or%20even%20dividends.
makes you not wanna go
Your tax affairs will become complicated and you need to take advice. The BTL will still be taxed as UK income and subject to UK tax.
Your will will have to work in GB law and UK law and I have no idea of the difference. Or two wills - pay for advice.
IHT - tax efficiency - give away as much as poss and then live for seven years. Other than that, £3000 / y once. £325 000 is tax free, the remainder at 40%, Regular payments to relatives are tax free, and so are gifts out of income which do not decrease your standard of living.
advice needed: I have no idea how you persuade the tax man of the last two.
I think this is the last place I was wd act on information from