The information requested is not held centrally.
While swimming and water safety is compulsory in the national curriculum for PE at primary levels (key stages 1 and 2), the department does not set a recommended number of hours to swimming lessons in schools.
As part of the government’s ‘Sporting Future’ strategy the department asked a group of representatives from across the swimming sector to submit an independent report setting out recommendations for improving curriculum swimming. Their report was published in July 2017 and can be found at: http://www.swimming.org/assets/Swim_England_Curriculum_Swimming_and_Water_Safety_Review_Group_Report_2017.pdf.
The department has established an implementation group and is currently reviewing the recommendations in the report.