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When you quit these shores be sure to sent a Form P85 to your UK tax office. On receipt you will be classified as non resident. For the departure tax year the split year procedure will apply, one part resident, the other part non resident. The form provides for the refund of tax overpaid on departure.
Then as you depart you will get a refund, but don't hold your breath. Delays in the system these days are huge.
It happens every day with the increase in mobility, albeit reduced now with COVID-19. Saudi Arabia is currently on the Amber list.
Just Answer protocol does not allow me to engage privately. Your only engagement with HMRC is likely to be if you let out your house or flat.
Delighted to have been of assistance.