At 16:35 on a Friday in February 2016 at the end of a working week, only a few weeks after his 32nd birthday, my son Alex was killed close to home in Oxford, by the kickback of a top-handled chainsaw. After three years as an arborist in New Zealand, Alex had recently returned to the UK, was glad to be home and life was good. And just a few days previously he’d said that he was happiest when working up in trees.   Alex was known for safe working, was well-secured,