Thats really sad and Medway should put its hands up on this one.
If I am right Maths was the middle paper and surely this would affect the poor kids' perfomance on the remaining paper too. The little ones would just panic through thinking they could be stopped early again.
The pandamonium alone of collecting the papers and giving them back would just throw a lot of kids off. They have nerves already and for the council to not take responsibility is utterly shameless.
The article states there were 268 kids there but am wondering if they were all affected or just some of them? At the Maths school, they put them into about 15 or so different groups in diff classes so perhaps that avoids messing up with all the kids unless they use one central start and stop time. I hope the parents affected will keep pushing for a fair resolution from the council.