This post has been here a while so I don't know whether anyone is still following it, However, I grew up at Turners Court, I now live in NZ.
Turners Court started life as the Oxfordshire Colony in 1911 and the Wallingford Farm Training Colony. It was set up to essentially put to work 'idle hands' from the cities in an experiment to stem vagrancy and petty crime.
In WW1 it was then used to put 'conscientious objectors' to work on the land as part of the war effort.
at this time and through to the 70's it was run along similar lines as a military style training centre, but training rural activities rather than military ones.
After the 70's it changed it's focus from agriculture (although the training farm was still there) to other 'trades' like mechanical engineering, woodwork, catering, painting & decorating, horticulture, etc... and introduced classroom curriculums.
Throughout it's history boys were placed here by the authorities if they were deemed to be on the 'wrong path' or at risk. In the early days it was boys and young men, I believe after WW2 it was just boys, generally between the ages of 14 to 18.
Especially in the early days these colonies were set up to teach Rural trades with a view of giving them the skills to take to and populate the New Worlds, therefore you should find many people in Australia and New Zealand whose great grandfathers and grand fathers will have passed through these colonies.
Here are some photos of Turners Court and some of the people who lived and worked there.
http://www.benson-village.co.uk/Localities/Turners-Court/A good book on the history of Turners Court is on Amazon
https://www.amazon.com/Oxfordshire-Colony-Turners-Wallingford-1911-1991/dp/1452077290I hope this helps with someone's research.