When you apply for PIP, have your National Insurance number, contact details, bank or building society details, and your GP or other health professional’s information ready. You may also provide medical evidence, such as clinic letters, care plans, prescription lists, test results, or a supporting statement from someone who understands how your condition affects you. A symptom diary or examples of difficulties with daily living and mobility can help explain your needs, but you do not need to wait for every document before claiming. Check the latest guidance on GOV.UK, as the Department for Work and Pensions decides what evidence is relevant in your circumstances.