What's behind the PM's plan to axe A-levels?

One of the announcements made in Rishi Sunak's conference speech was to scrap A-levels in favour of a qualification which includes compulsory English and Maths. With several problems in the education system, and years of disruption for students, what was behind the PM's decision to radically overhaul the system? James Heale speaks to Fraser Nelson and David Laws, former education minister who now chairs the Education Policy Institute.