Hi,
If you are UK resident and domiciled, then you are taxed on your world-wide income on the 'arising' basis. What this means is that you are taxed on the income/gains in the tax year in which they arise. This may mean that you are required to submit a Self Assessment Tax return.
Please have a look at the self assessment criteria tool below, to check if a Self Assessment Tax return is required.
Check if you need to send a Self Assessment tax return
Thank you.