Useful documents include a written account of what happened, the accident date and location, photographs of the scene or injuries, witness details, and any incident or police report. Keep medical records, appointment details, prescriptions and receipts, along with evidence of lost earnings or other costs. Save all correspondence with an employer, insurer or organisation involved, and do not delete relevant messages or photographs. A solicitor regulated by the SRA can explain what further evidence may be needed for your particular circumstances.