The bishop's Latin episcopal signature is: " (firstname) Roffen",[2] Roffensis being the Latinised adjective referring to Rochester.

An ancient diocese, it was established with the authority of King Æthelberht of Kent by Augustine of Canterbury in 604 at the same time as the see of London.

Its establishment was the first part of an unrealised plan conceived by Pope Gregory the Great for Augustine of Canterbury to consecrate 12 bishops in different places and another 12 for the prospective see (later province) of York.

[5] In May 1877, Essex and Hertfordshire became part of the newly created Diocese of St Albans.

Baker is licensed as an honorary assistant bishop in the diocese for this ministry.