Ofsted has warned, ‘Thousands more children than previously thought are at risk of harm and indoctrination in illegal madrassas and faith schools.’ Inspectors uncovered 100 ‘underground’ schools across Britain, many catering to very religious communities. A third of illegal schools were Muslim, and one-sixth either Christian or Jewish. Others were private, non-religious schools. Investigators were deeply alarmed by sub-standard education which undermined Government efforts to ensure schools promote British values. In a drive to crack down on radicalising pupils, new rules state that schools must promote tolerance of other faiths and lifestyles. The illegal schools have not registered with the Government and so are not subject to any regulation. Ofsted said that pupils attending these schools may be at significant risk of harm and indoctrination. Inspections revealed serious fire hazards, and unsafe and unhygienic premises. Ofsted believes that unregistered schools uncovered so far are a small proportion of the total of those operating.