Lot sof pruivate schools now offer flexi boarding.
Most parents have completely gone off the idea of full boarding but might find one nioght a week useful. Or a few days from time to time.
Last year, my DD did two nights during one term. Not becauase of work, but because she was involved in school activities until very late and it seemed daft her coming home only to brush her teeth and go to bed. It also meant she could sleep later the following mornings!
That said, it would have been useless as child care due to the holidays
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