It is clear that there are not enough maths teachers in the UK, generally class sizes are too large for effective teaching and classes also tend to comprise too broad a spread of students’ abilities. In some cases students without very strong passes (Grade 8 or 9) at GCSE are encouraged to take ‘A’ level maths, when they are unlikely to manage demands of the course. All of these factors lead to large regional disparities in ‘A’ level results, this article suggests a solution.
To tackle regional disparities in the numbers of students studying A-level maths, the government should approve plans for more university maths schools, says the CEO of U-Maths.
The regional divide proves the need for more maths schools:
https://www.tes.com/magazine/analysis/secondary/regional-divide-maths-at-a-level-more-maths-schools