The turnover of independent school headteachers could be "accelerated" by the impact of Labour's VAT on fees policy, Robin Fletcher, chief executive of the BSA Group, has warned. In response to a question from Tes during a session at the Schools and Academies Show in Birmingham, Mr Fletcher said the "nature of headship is changing" in the independent sector, and that there had been an "alarming flurry" of recent headship changes.