Gather your employment contract, recent payslips, redundancy or dismissal letter, consultation correspondence, and records of your start date, hours, pay and holiday entitlement. Keep copies of any settlement agreement, notice details, pension or benefits information, and messages about the redundancy process. These documents can help check whether your employer’s calculation appears consistent with your terms and statutory rules, although entitlement depends on your individual circumstances. If anything is unclear, contact Acas or speak to an employment solicitor regulated by the SRA; GOV.UK also explains statutory redundancy pay and benefits claims.