Capital Gain Tax and PRR

Hi, I move from foreign country to the UK. I was own my property with cost £100,000 in year 1998 and sold my property with gain £500,000 before I came to the UK in 2023, I claim PRR and brought a property £500,000 in the UK in 2023 as well. May I know once I sold my property in the UK at £500,000, any CGT involve? The cost count at £100,000 or £500,000? Thanks

Hi,
We cannot comment on future events as legislation may change.
Thank you.