Estimating capital gains tax on an overseas inherited property

I recently sold properties that I inherited after my father's death in 2022. These properties are located overseas, and my father never resided in the United Kingdom at any time in his life. The documents I have to prove the capital gains tax include: the original property ownership documents in my father's name, the inheritance certificate listing the legal heirs, preliminary contracts for the sale of the inherited properties, and a local real estate firm's appraisal of the change in property value from the time of my father's death until the time of sale for the purpose of calculating the capital gain. Are these documents sufficient when submitting the annual self assessment? Thanks for the advice

Hi,
You do not have  to submit supporting documentation when declaring a Capital Gain to HMRC.
However you should retain all relevant documentation to enable you to answer any HMRC queries.        
Capital Gains Tax: what you pay it on, rates and allowances.
Thank you.