It's being reported on the BBC that the government had been warned about crumbling schools but Sunak went ahead and halved the school's repairs budget in 2021.
Taken from the BBC:
Rishi Sunak was already under pressure to take charge of the crumbling concrete problem and ensure repairs are made as fast as possible.
Now, thanks to an unusually direct intervention from a retired civil servant, Sunak faces an even more complex problem: showing he is on top of the issue while also defending his actions in the past.
The accusations made by Jonathan Slater, who ran the Department for Education for four years until mid-2020, are very serious.
He said he had warned the Treasury there was “a critical risk to life” if it did not fund the repairs programme - but at a 2021 spending review, when Sunak was chancellor, the number of schools given money for repairs was halved.