The current data for teacher training applications for September 2022 has just come out and it is not only down 24% on last year, when more people decided to train as teachers in an uncertain economy, it is also 8% down on the same time in 2019 well before covid. The government have missed recruitment targets for years so there's already a critical shortage, particularly in subjects like maths, physics and computer science, and especially in the disadvantaged areas of the country that the government is supposed to be 'levelling up'.
The government had banked on lots of people wanting to train as teachers in a recession and cut the training bursaries massively. This has clearly had an impact and we are now facing an emergency unless something happens that turns this around.