(a) The Emergency Medical Service was not a self- contained Service, but made use of the existing hospitals, municipal and voluntary. The number of whole-time doctors in the Emergency Medical Service was 1,821 including 591 house officers who were not actually enrolled in the Emergency Medical Service but had their salaries reimbursed. In addition there are the regular medical staffs of Local Authorities employed in municipal hospitals included in the scheme. (b) The Emergency Medical Service dealt with many classes of case apart from the air-raid casualties for which it was originally designed-for example, Service casualties and sick, Civil Defence workers injured on duty, sick persons transferred from inner to outer hospitals, transferred war workers, fracture cases among war workers, etc.