Declan 1969

Hi I made losses on two individual share purchases. In both cases the shares (quoted on the AIM) were delisted and the companies ceased to exist in their current form with the shares worthless. The shares were purchased in 2013 and 2014 respectively. With the delisting taking place in May 2015 and January 2020 respectively. What is the position with these two share purchases and capital gains losses? Can they be included in a future capital gains offset for a future finacial year?