CGT on property in Channel Islands

My mother and I jointly are named as owners of her property in the CI. I live in the UK owning a house here jointly with my husband. The CI house was bought in Aug 2021 for around £300k. It is now worth around £400k after much renovation. On her passing when/if I sell the property what CGT implications will I have? I am only child and sole beneficiary. Thank you.

Hi,
Please see the link below
Tax when you sell property: Work out your gain
Thank you.