Almost half of teachers in Wales who took a professional headship qualification have no intention of becoming heads, according to a major piece of research carried out for the Assembly government. It found that two-fifths of non-headteachers who held the National Professional Qualification for Headship (NPQH) said it was unlikely they would ever become a school leader. Some said it was because of the negative aspects of headship, while others said there was not enough of a pay rise for the extra responsibilities they would have to take on.