Income Tax and Personal Tax

I am working in UK in 40% tax tier. I have some bank saving in Jersey also have some dividend / interest in a investment platform. My employment is with PAYE so i think i no need to handle for my job. Do i need to self assess for my bank interest in UK and especially in Jersey and how about the interest / Dividend that created in investment platform if i have not withdraw anything from them to UK, please?

Hi Vincent Cheng,
Please refer to guidance here:
Tax on foreign income
Thank you.