ARamp

Hi, following the death of my mother (NOT a UK resident/national) I inherited two properties in a foreign country in 2023 and sold them a few months later. I already paid tax in that country, as it must be done together with the sale. In relation to what should I calculate my foreign capital gain to see if I need to pay tax in the UK as well? As I inherited the properties, should I still look at the purchase price / market value to calculate the gain on? Many thanks.