“The provision in the new Rules gives the Tribunal the power to require a parent to make a child available for assessment by an appropriate professional and/or to require a school to allow a professional instructed by a parent into the school to assess the child’s functioning in a school environment. This is designed to ensure professionals can provide up to date information about a child and ensure the right level and balance of up to date evidence is given to the Tribunal so that it has the fullest possible picture to support effective decision-making for the child.”