Pension investment in other country

Dear Sir/Madam, I have an Income Annuity Plan (similar pension investment plan for 25 years long) in Asia . This plan I had already put the total amount in the plan and I will have few hundred pounds every month (below 5%) for 25 years. My questions is, this few hundred pounds, do I need to put it into part of my income . For this income Annuity Plan the advantage is after 25 year I might gain more interest (8-15%) It might be not as not 100% guarantee. Or after 25 years the Annuity plan complete. I need to make the capital gain tax. Looking forward to get your reply. Vivi

Hi,
Please refer to guidance at Tax on foreign income.
Thank you.