Most school inspections were carried out by additional Inspectors (AI) employed by external companies known as Regional Inspection Service Providers (RISPs). there were 1,948 AIs, of whom 1,567 inspect schools. Although Ofsted claims that most of these have teaching experience, in 2012 it was forced to admit that it had done no quality control checks on these inspectors, and that a few of them – including lead inspectors – were not qualified teachers as prior to 2005 they had been 'lay' inspectors. In 2015, the chief inspector (Sir Michael Wilshall) decided that he wanted more direct control over Ofsted inspectors brought responsibility for their training, deployment and quality 'in-house' and abolished the contracts with the RISPs who are no more. 40% of additional inspectors who wanted to continue working for OFSTED were not re-hired after the contractual change. Although OFSTED insisted that this was part of a quality control process and 'should not be seen as an admission that its inspections were substandard', serving headteacher and "Times Educational Supplement" columnist Geoff Barton commented 'dispensing with almost 40 per cent of inspectors on the grounds of quality is hardly an endorsement of standards.'