https://www.rfaa-london.org.uk/app/wp-content/uploads/2020/02/RFA-history-11-RFA-Draft-Tugs.pdf A research note on the history of ships, places, organisations and events associated with the Royal Fleet Auxiliary (RFA) Ocean Tugs of the RFA
Detailed histories of most RFA vessels can be found here Historical RFA recording the History and Honour of the RFA