Hi treborsenots,
When working out if there is UK capital gains tax to pay on the disposal of your overseas property, you can consider private residence relief, if the property was your main residence for all or part of the period of ownership.
Where the property was your main residence for the entire period of ownership, private resident relief would be 100% of the gain on disposal of the property and no capital gains tax is due. Where the overseas property was your main residence for a period that is less than the period of ownsership, the private residence relief will only be a fraction of the gain, so some capital gains tax may be payable.
Have a look at
HS283 Private Residence Relief (2023).
There is a calculator at
Work out tax relief when you sell your home, to help you work out if there is capital gains tax to be paid.
Thank you.