Hi,
Yes, as you are resident and not domiciled in the UK, you are required to declare your worldwide income and capital gains.
As you are in receipt of foreign dividends, you are required to declare through a Self Assessment tax return, regardless of the amount of dividend income. If you have to pay foreign tax on the dividends, you claim a foreign tax credit for a percentage of the foreign tax paid. The percentage varies from country to country, dpending on the tax treaty with that country.
Tax treaties
Thank you.