Yes, you will have to pay income tax on your wages. If you have been employed in the UK since April, your previous employer will issue a P45 form, showing your earnings to date, if you do not have this form, you will need to complete a P46 form on arrival. Please note: that if your income for the financial year (6th April to 5th April) is below the personal allowance (£12,570– 2023/2024) you may be able to reclaim this tax at the end of the financial year.