Hi Miranda Lim
If you sell the overseas property before you move to the UK, any gains from the sale will not be taxable in the UK.
If you dispose of the property after you arrive in the UK, then you may be subject to capital gains tax in the UK, depending on your residence status and if a gain arises.
Income that was taxed in the UK and moved to an overseas bank account is classed as capital when returning it to the UK, so will not be subject to further tax.
Have a look at the guidance for residence, domicile and remittance at
Residence, domicile and the remittance basis: RDR1
and the statutory residence tests at
RDR3 Statutory Residence Test
There is also a tool to help you with this.
It can be found at (
Tax on foreign income).
These will help you make an informed decision on your residence status, for the tax year in which you move to the UK.