Correct. Amber and Red trigger certain processes with councils, blue light services, power companies, transport and other national infrastructure organisations and operators. Such things like cancelling leave, bringing people in on days off, moving equipment around or safeguarding sites etc. So such decisions are not taken lightly as there is a cost implication for these services when they do. For example, one of my previous employers would block book hotel rooms near to the workplace in case staff were unable to get home, in the event of certain warnings from the Met Office.