on 25 september 2013, snow was consecrated a bishop by justin welby, archbishop of canterbury, during a service in westminster abbey. in october 2013, he started his duties as bishop of tewkesbury, a suffragan bishop in the diocese of gloucester. he was acting diocesan bishop of gloucester from 5 august 2014 until rachel treweek took up the role of diocesan bishop in june 2015.