A headmaster who is banned from teaching for life has published a memoir offering tips on leadership and education. Jonathan Ullmer’s book called Jumping Out of the Window has been listed online at Waterstones and WH Smith for £12.87. He was struck off in 2019 after a tribunal found he had sexual activity with a male pupil in the 1990s. The victim said Ullmer, now 63, demanded naked massages and shared a bed with him when he taught at Cecil Jones High School in Southend, Essex. Ullmer denied