Hi,
On the supplementary page SA106, you declare the chargeable event gain in box 43 and the number of years of the policy in box 44 on page F6.
Self Assessment: Foreign (SA106)
When tailoring your online return, you select yes to foreign income on page 1 of 3. On page 2 of 2 for the foreign income, tick the box for "Any other overseas income and gains" and save and continue.
Thank you.