The families of three Britons who were killed in a plane crash in Ethiopia have welcomed a verdict of 'unlawful killing' at an inquest as the coroner ruled Boeing's conduct should 'constitute the crime of manslaughter'. Humanitarians Joanna Toole, 36, Samuel Pegram, 25, and Oliver Vick, 45, were among 157 people killed on onboard flight ET302. Adrian Toole pictured outside …