What action should NOT be done until a TSSA inspector releases the scene after an incident?

Disturbing the incident scene is crucially important to avoid as it helps preserve all evidence for investigation purposes. When an incident occurs, especially in the context of gas safety, every detail of the scene could be critical for understanding what happened and preventing future incidents. A TSSA inspector is trained to assess these situations thoroughly, and disturbing the area could compromise their ability to do so.

The other actions, such as contacting insurance, making the area safe, and notifying emergency services, can be necessary steps depending on the situation and should be handled in accordance with safety protocols. However, altering or disturbing the scene before the inspector has given the go-ahead could lead to misinterpretation of the incident or loss of vital information needed for investigation. Hence, preserving the integrity of the incident scene is paramount until an inspector officially releases it.