When seeking debt help services in the UK, you typically need to provide your income details, such as payslips or bank statements, along with an overview of your monthly expenses. It's also important to gather information about your debts, including creditor details, amounts owed, and any payment arrangements. Additionally, recent correspondence from creditors and any relevant identification documents may be required. Always check with your chosen debt advisor for a specific list tailored to your situation, as requirements can vary.