I received a letter with the title YOUR CLAIM FOR EMPLOYMENT AND SUPPORT ALLOWANCE. A CHANGE IN THE EMPLOYMENT AND SUPPORT ALLOWANCE RATE PAYABLE. It says that from 7 Apr 2023 my new rate will be £135.35 ( which it is at the moment). This is because of a change in money coming in (Im not aware of any change), and that it's based on 2008/9 tax year. Been trying for the past hour and a bit to get through. Does anyone know what this letter could possbily mean at all? What is the change in money as my circumstances havent changed? Why does it change next year (is that not quite far away)? And why use the tax year of 14 years ago?