[IF NOT ALREADY ON THIS PAGE, GIVE LINK]
We have an article that explains that here: https://www.ridgefieldconsulting.co.uk/advice-and-news/how-youre-taxed-when-you-have-more-than-one-job/
[PAUSE 10 SECONDS]
You pay income tax on your total income for a tax year regardless of the number of jobs you have. You will pay a higher rate of income tax if your total income brings you into the higher or additional rate income tax brackets.