Foreign insurance gain covered two years

Hi, my insurance was matured in Sep 2023 and it was a two year policy. A gain was received in Sep 2023 and I know this needs to be reported in self-assessment for 2023/2024. However since the gain was for the two years covered, can I split the gain into two halves and report in self-assessment for 2022/2023 and 2023/2024 respectively?

Hi,
No, the gain arose in the tax year that the policy matured and so the gain is taxable in that year.
Thank you.