Your calculation is way off, UK taxes are progressive but you don't just get a 4...

Your calculation is way off, UK taxes are progressive but you don't just get a 45% once you reach the threshold - otherwise there would be salaries where it would be better to earn less than slightly more.

Here, the calculation: https://listentotaxman.com/?year=2021&taxregion=uk&married=f...

120K EUR is 79.7K E

PS: Also 120K EUR in the UK is NOT very senior.