2012: A Channel 4 News investigation revealed that examiners were making the most basic errors, such as wrongly adding up marks on hundreds of papers, which in some cases led to candidates in 2011 getting an incorrect grade. A senior supervisor at OCR, David Leitch, ordered his team perform supplementary checks on scripts by the same markers, and found hundreds of errors. This led to OCR ordering these additional checks to stop, and to only inform those schools which had specifically requested scripts to be re-marked. David Leitch was suspended from OCR, after reporting the incident to Ofqual, and informing 30 schools about the mistakes himself. Ofqual have said to have subsequently investigated the exam board, and asked the exam board "to carry out extended checks, identify the weaknesses in its processes and to put these right in time for the January exams". The Department for Education said the level of error was "simply unacceptable".