The crossword solution for the term BOOTS ONE is ERRS. This is an acronym for 'Emergency Response and Rescue Service', which is a volunteer organization that provides emergency medical services and search and rescue operations in the United Kingdom. The organization is made up of volunteers who are trained to respond to emergency situations and provide medical care and assistance to those in need. They also provide search and rescue operations in areas where there is a risk of injury or death due to natural disasters, accidents, or other emergencies.