He was educated at Hull Grammar School and the University of Edinburgh, where he was president of the Students Representative Council.
And since 2010 has been on the board of AllChurches Trust, the charitable owner of the insurer which maintains close links to the Church through its funding priorities of block grants to dioceses and cathedrals.
[5] In 2015 he was also President of Nobody's Friends,[6] a private dining club in Lambeth Palace which was cited in the Peter Ball hearings at IICSA, the Independent Inquiry into Child Sexual Abuse.
[10] In January 2008, Mawer was appointed as an "independent advisor" to Gordon Brown, investigating alleged breaches in the ministerial code of conduct.
In May 2009, he conducted an investigation into allegations by The Daily Telegraph that Justice Minister, Shahid Malik, had paid a rent below the market rate for his home and constituency office.