What is the difference between an HMI and a Registered Inspector or Registered Nursery Inspector?

An HM Inspector of Education and Training in Wales (HMI) is employed directly by Estyn.  A Registered Inspector (RgI) and/or Registered Nursery Inspector (RgNI) is self-employed and works under contract with Estyn.  RgIs and RgNIs have a background in education and they have successfully undertaken inspection work as team members.  They have also passed rigorous training and selection procedures before the Chief Inspector places them on the list of RgI and RgNI.