The morning before he died, Dipu Chandra Das left home at first light, stepping out of his tin-sheet house in Bangladesh's Mymensingh city, overlooking a warren of lanes off the highway from Dhaka. The 28-year-old woke up his father, said goodbye to his wife, cradled his 18-month-old daughter. Then he boarded a bus for the 60km (37-mile) journey to the garment factory where he worked as a junior quality inspector, checking sweaters bound for global high-street brands such as H&M and Next. His