Added ‘ISI Standard Inspection Cycle Letter’ and ‘Ofsted Standard Inspection Cycle Letter’.

Replaced the ‘memorandum of understanding’ document with revised direction to Ofsted on monitoring ISI as the only approved independent inspectorate.

Removed letter to the School Inspection Service, which has ceased inspection of schools in England.

Removed letter to the Bridge Schools Inspectorate, which closed on 30 September 2015.

First published.