 Daniels has also been a member of the board of directors for the Clean Break theatre company.Daniels' civil partner of many years, activist and schools inspector Claire Walton, died in 2009.In June 2019, Daniels' dramatization of Jeremy Gavron's 2015 "A Woman on the Edge of Time", a memoir of his mother Hannah Gavron, was broadcast as the "15 Minute Drama" on BBC Radio 4.