Paying tax on full amount and/or interest transferred to UK?

I am from the UK but have been non domicile, non resident, working overseas for a number of years. I pay tax on my income where I live, and UK has a double taxation treatie with the country. If I transfer a large amount of savings into my UK bank account from an offshore account where I have been saving money, will I be taxed on the full amount, on the savings, or on nothing due to the treatie?

Hi,

You can see guidance here:

Tax on your UK income if you live abroad

Thank you.