Every single other worker in retail, healthcare, the lot wears masks.
Teachers have explicitly been told not to wear masks by DfE.
They are the only group of workers who are not allowed even basic protection.
Would a GP go to work without a mask? If not, why should a teacher? The teacher probably has a higher risk since you're not supposed to contact your GP at all if you have covid symptoms.
Anyway, if Baga is a GP I hope VERY MUCH I never get her as my doctor because any GP that is so willing to disregard the overwhelming scientific consensus on an issue because it's personally inconvenient to them is not a good doctor.
The scientific consensus on what minimising sars-cov-2 risk in schools looks like is overwhelming and complete - and it includes masks, social distancing, smaller class sizes and ventilation. Of which many schools have none. With one (masks) explicitly being disallowed by DfE and the others effectively being disallowed by providing no extra funding.