What Williams should do next after tech chief's exit

Williams's Formula 1 chief technical officer Paddy Lowe has left the team on the eve of the 2019 season, following a disastrous winter and testing fortnight where the car was ready late and proved slow when it hit the track. Edd Straw and Scott Mitchell assess where it all went so wrong for Williams, and discuss the change of approach it should take as it starts planning its latest major technical overhaul