My hon. Friend makes an important point, but the latest figures show that vacancies remain stable at below 1 per cent. As he has said, no school is without a head, but there are schools with acting heads. I have explained what we are doing about it: we are working with the National College for Leadership of Schools and Children's Services to seek to identify at an early stage in their career those people who might want to be head teachers and work with them to achieve their goal. We have also tried to ensure that we do as much as we can to support head teachers in post in schools in their administrative and financial tasks. One reason why we have increased the number of administrative assistants and, indeed, of school business managers is so that head teachers can concentrate on their major task, which is teaching and learning in the school.