Sometimes you might have to access another area through a scaffold structure, never use a scaffold structure unless it has been inspected and tagged by a competent person.
You are required to wear your safety harness so always remain clipped onto a fixed point at all times when you’re working at height. Working outside presents further challenges. Have you checked the forecast for the day? Take account of the ambient conditions to ensure your safety. Remember people are often working below you, so always ensure that the area below you is restricted so that people are not put at risk by your actions.