Teacher, 68, died from asbestos exposure after builders removed the deadly fibres from classrooms while she taught lessons during her 30-year career The grandmother was diagnosed with malignant mesothelioma, which can lie dormant for decades, in 2014 and died in June this year. During the inquest, held at Exeter's County Hall, the court heard that Sue had written a statement saying she recalled construction work being undertaken at another school and asbestos being removed by builders in the classrooms during lessons.