Do you think starting school late helped students achieve better exam results

A school in the North East of England that allows its pupils to start the day an hour late says that exam results have improved.
The headteacher Dr Paul Kelley told the BBC that he lets students at his school an hour late because it is not natural for them to wake up early.
He feels that young people wake up late because of biological reasons and schools should adapt their timetables to let them come in late.
Dr Kelley also said that students study better in the afternoon and that his school has seen a 20-30% improvement in exam results!
This novel approach to education has been overseen by scientists including Oxford neuroscience professor Russel Foster.
Other findings include an improvement in the rate of absenteeism.
We asked a number of people what they thought of starting school late.
There was a marked contrast in the answers given to us by older and younger people.
Older people were against the idea, whilst younger people appeared to favour coming into school later.
Why do you think starting school late helped students achieve better exam results?