The National Education Union has accused private schools of exploiting staff to save money. ‘Staff working in the private education sector,’ said Daniel Kebede, general secretary of the NEU, ‘report that workload is being increased… in response to the cost-of-living crisis and increased cost of VAT and national insurance.’

It is of course true that private schools are under more financial pressure than ever, and are making cost-cutting decisions that may add to teachers’ workload: one in five private school teachers say they have had colleagues made redundant since VAT on school fees was introduced, while 26 per cent say that their school...