THE school has been dubbed Britain's strictest over its 5pm finishes and Saturday detentions for slacking pupils.
Mercia School in Sheffield, Yorkshire insists on "high standards of behaviour and teaching", which it enforces through some of the most stringent rules in the country.
The school day is far longer than most, as Mercia opens its doors at 7.30am and home time isn't until 5pm Monday through Thursday.
On these days lessons run from 8.20am until 4pm, with the remaining hour at the end of the day reserved for "self-study" and homework.
On Friday's home time is 3.45pm, but get three detentions in a week and students will be kept on for another two and a quarter hours in "Headteacher's detention".
