Dont know about fresh air fortnight but the mention of Quarriers homes reminded me of when we would get sent by St Vincent De Paul to their convent in Langbank for a week.
My brothers and I went there three or four times and it was magic, a bed of our own to sleep in three meals a day huge field to play in with the best of the lot a Maypole.
OK there was mass every morning and benediction at night, the nuns who ran the place were very strict , but hey it was a holiday.
Not many people where I lived could say they had been on holiday