Where a CWSC is located in the roof space of dwelling and the space beneath it thermal insolationwhat action should a plumber take?

If a cold water storage cistern (CWSC) is located in the roof space of a dwelling with thermal insulation beneath it, a plumber should ensure that the cistern is adequately insulated to prevent freezing in colder temperatures. They should also check for any potential leaks or issues with the cistern that could impact the insulation's effectiveness. Additionally, the plumber may need to consider relocating the cistern if it's at risk of freezing or if access for maintenance is limited.