Hi,
As a UK resident, you are required to declare your world wide income and capital gain, using the 'arising basis'.
The income and capital gains is declared in a Self Assessment Tax Return, in the tax year that it arises, even if it is not remitted to the UK. The overseas income and capital gains is declared on a self assessment tax return.
As you are not domiciled in the UK, you can elect to use the remittance basis, where you claim the remittance basis and declare the income and capital gains that you are not remitting to the UK. If you remit the income or capital gains in a later tax year, they will be taxable in that later tax year.
Have a look at the below, as it is not always the best option.
Residence, domicile and the remittance basis: RDR1
You claim the remittance basis through a self assessment tax return. The rules for the remittance basis will change from 6 April 2025.
Individuals who opt into the new regime will not pay UK tax on any foreign income and gains arising in their first four years of tax residence, provided they have been non-tax resident for the last 10 years.
Thank you.