A self assessment tax return is required where you are in receipt of any foreign dividends or bank interest.
If your foreign dividends are below £2000.00, then you can declare this in box 6 of SA100. You would need to submit a self assessment tax return, to claim the remittance basis.
Have a look at the guidance at RDR1 Residence, domicile and the remittance basis: RDR1
to see if the remittance basis is more beneficial to you or not.