Phase one of their seismic change has been executed. The shock of 450 redundancies. Virtually a complete overhaul of senior management. Significant changes purposely carried out at speed in a bid to ensure the process was not dragged out and the inevitable unease could start to settle much quicker. After the mass Manchester United exodus has come the rebuild. BBC Sport tells the story of Sir Jim Ratcliffe's Old Trafford revolution. When he paid £1.25bn for a 27.7% stake in United on Christmas