Time limit on using previous capital losses to offset against gains?

Hello, I have an unreported capital loss from Tax Year 2019/2020. Can I report that loss (& use it to offset gains) on my 2023/2024 tax submission (to be submitted before January 2025) or is it too late? Thank you

Hi,

It is now too late as this should have been reported by 5/4/24 for it to be allowable.

Thank you.
 

Thank you for responding