Question to the Department for Education:

To ask the Secretary of State for Education, what the average proportion of students was obtaining the equivalent of (a) Grade 5 or better and (b) Grade 4 or better in GCSE (i) English and (ii) Maths in each Income Deprivation Affecting Children Index decile in each year since 2010.

The information is not readily available and could only be provided at disproportionate cost.

However, the department publishes the percentage of pupils achieving grades 4/5 or above in English and mathematics GCSEs by Income Deprivation Affecting Children Index (IDACI) deciles.

Data back to 2014/15 is published in the annual key stage 4/GCSE and equivalent statistical releases, which are available at the following link: https://www.gov.uk/government/collections/statistics-gcses-key-stage-4. To find data by IDACI, see 'pupil residency and school location tables'.

Reformed GCSEs using the 9-1 grading scale were first introduced in 2016/17 with most GCSEs exams using the scale by 2018/19.