[9] In 2012, Mason moved to Yorkshire, having been appointed Priest-in-Charge of Church of All Saints, Bingley in the Diocese of Bradford.
[9] She was announced as the next Archdeacon of Richmond and Craven of the Diocese of Leeds in September 2015, and left All Saints at the end of 2015.
[14] In the vacancy following Paul Bayes' retirement, Mason became acting diocesan Bishop of Liverpool.
[1] In April 2024, it was stated that she was away from the diocese and not carrying out any engagements, for reasons not thought related to her health.
Mason then stated in a pastoral letter to the Diocese of Liverpool that she was the female bishop in question.