What is PAYE?
For most UK workers, the Pay As You Earn (PAYE) scheme is how they pay the tax they owe on their income. HMRC gives you a tax code, which your employer uses to work out how much tax to take from your pay. They then send that money to HMRC before paying the rest to you. In most cases, you don't have to do anything about it yourself. However, it's worth keeping tabs on how much tax is coming out of your pay.
PAYE and not being reimbursed for your work expenses for travel, food or uniform?