There is another way to work around that. Most large UK companies pay you in lieu of unused holiday allowance when you leave. If you arrange to leave your pre

There is another way to work around that. Most large UK companies pay you in lieu of unused holiday allowance when you leave. If you arrange to leave your previous company in late April/early May and have this holiday pay included in your final paycheck, only this paycheck will appear on your P45. So if your new employer estimates your previous salary by looking at your P45 to see what you earned in that month and multiplying it by 12, you can easily have them overestimate by about 25%.