In practice this flexable working is going to be a nightmare for the Managers too, as in addition to their usual paperwork, they have to plan "banked hours" for 100+ 200+ Posties, they also will have to work out shift work, decide who is coming in early or late, who needs cover and all this in addition to having to cover Cut offs, they will be in tears.
This is Crozier doing, everything he touches turns to sh1t, he has never been a Postman, he doesn't know the job at all, he left a trail of destruction in all his previous employments especially the FA , so expect the same here, we will be picking up the pieces when he leaves with a big fat payoff in his back pocket.