CGT - gift property share to brother

Hi - I have a residential property which me and my sister own 50% each (with a residential mortgage) - bought in 2019. This is the only property me or my sister own. My sister lived at the property from 2019 up until early 2023 - since early 2023 she has been renting an apartment elsewhere with her husband. I have paid all the mortgage / housing costs since we bought the house. My sister wants to gift her share of the property to me as she wants to buy her own house. The property value has increased by £500k since we bought it. As this is the only residential property she owns (and where she lived for the majority of the time since we bought the house) - would either of us incur CGT? How much would this be in light of the increase in property value?

Hi,
Your sister may be liable as it has not been her main residence for the whole period of ownership.
Please refer to  - Capital Gains Tax: what you pay it on, rates and allowances
Thank you.