Quote Originally Posted by Toadstool View Post
Don't see how they can change things - is it based on where you live or where you work?

Company payroll software will be a nightmare if it has to maintain two different tax systems that might changes depending on location.
According to the letter it depends on where you live. If you live in Wales a C will be added to the front of your tax code. Company payroll software will simply adhere to the new code, the same way as married persons allowance is.