He was subsequently cast in the role of languages teacher and later headmaster[5] in Channel 4's historical reality show That'll Teach 'Em[6][3][7][8] which ran for three series from 2003 to 2006 and aimed to find out whether the standards of 1950s and 1960s boarding schools could produce better academic achievement for GCSE students.
In 2015 he took on the focal role in On the Warr Path, a BBC radio programme in which he completed a weekly range of challenges set by the producers.
These included modern dance, archery, taking part in an assault course, working as a car mechanic and learning to play the guitar.
[1] It is a fictional retelling of the downfall of Peter Hobson, headmaster of Charterhouse, who resigned after his relationship with a female escort was exposed by a tabloid newspaper.
[11][12] Presumed Guilty is Warr's account of spending almost two years on bail accused of historical abuse offences and his battle to clear his name after being acquitted of all charges.
[13] Shortly before his death he had completed the final draft of his second novel, provisionally entitled Swinefest, a fictional account of a criminal conspiracy by former pupils to frame a teacher for historical sexual abuse in pursuit of compensation by a school insurer.
[4][15] Warr appeared on BBC Newsnight after his acquittal to discuss the way in which historical allegations are handled by police and the Crown Prosecution Service.
He subsequently wrote about his 672-day ordeal, including nearly two years on police bail, the trial, and his acquittal in an essay entitled "Something Good Has to Come from This", published in The Justice Gap magazine in 2015,[17] followed by his 2017 book Presumed Guilty.
He also appeared on Jeremy Vine, along with Labour MP Sarah Champion, to debate how historical sexual allegations should be handled by police.