Can I add an extra one here that always gets missed (most people don’t know we exist) and that of the local council emergency responders!
In every local council across the country (around 600 IIRC) there will be at least one emergency planning officer on call, a Local authority Liaison Officer and several volunteers ready to come and help if you are involved in an incident!
In the event of an incident, any day of the year, a EPO and a LALO will probably respond to look after the people affected once the uniformed emergency services have gone. In my council (a london borough), at least 3 or 4 people will be available at any one time over this period. Although hopefully we never get called out, anything from a fire, flood, snow, riot, train crash, plane crash etc will activate these people.