[4] He undertook training for ministry at St John's College, Nottingham.
Frith was made a deacon at Michaelmas 1974 (6 October)[5] and ordained a priest the Michaelmas following (28 September 1975), both times by Mervyn Stockwood, Bishop of Southwark, at Southwark Cathedral.
[6] He began his ordained ministry as a curate in Mortlake, after which he was Vicar of Thamesmead.
[7] Frith is also a trustee of maritime welfare charity the Mission to Seafarers.
[10] His canonical election was confirmed on 17 October 2014[11] and he was installed 22 November 2014 in Hereford Cathedral.