 Both organisations' work supports the statutory services in times of civil emergency or crisis.In peacetime, St John Ambulance is senior to the Red Cross however during wartime, the Red Cross would become senior due to an agreement with the International Red Cross and Red Crescent Movement.St John Ambulance, St. Andrew's First Aid of Scotland and the British Red Cross co-author and authorise the official First Aid Manual, the "de facto" UK guide for emergency first aid.