Have a look at the guidance at RDR1.
Residence, domicile and the remittance basis: RDR1
This will allow you to identify your residence status, as the tax years in which you leave the UK and return to the UK, may mean you still have to pay tax here.
For whole tax years where you are deemed not resident, you will not be liable to tax on your Saudi employment income in the UK. If you rent out your home while outside the UK, you will need to complete a Self Assessment Tax Return to report and pay tax on income from UK residential property.