Just spoke to OH (we own a scaffolding company), if a licence is granted then the scaffold will come down within the time frame laid out else penalties will occur and scaffold may be taken away and impounded by the council. If the builder applied for the licence then he will be looking at the fine so it's in his interest to get the scaffold down.
My OH's company is quite busy at the moment so dismantle regulates itself as they need the gear for other jobs, but, he said they job will be taken down when it can be worked into the work day, ie when lorries are empty usually in the afternoon, it won't necessarily be taken down the very next day.