Hi taxqueries2024,
If, having taken into account both the SRT and the relevant DTA, an individual with no UK income is deemed non-resident in the UK in a given tax year, then they would not be required to submit a UK tax return.
However, if there is any doubt about the individual's residency circumstances (eg dual residency) they should register for Self Assessment and complete the Residency and Foreign Income pages.
Tax on foreign income
Thank you.