found: Annual report and Form 20-F, Dec. 31, 2005:t.p. (Royal Dutch Shell plc) p. iii, etc (expression "Shell Group" used for Royal Dutch Shell plc and its subsidiaries; in 2005, Royal Dutch Shell became the single, 100% parent company of Royal Dutch Petroleum Co. and Shell Transport & Trading Co. Ltd.) p.6 (Shell Transport and Trading Company Limited previously known as The "Shell" Transport and Trading Company, p.l.c.) inside back cover (registered office: London; headquarters: The Hague, The Netherlands)
found: Verslag over ... en form 20-F, 2005:t.p. (Royal Dutch Shell plc) p. iii (expression "Shell Groep" used for Royal Dutch Shell plc and its subsidiaries)
found: DueDil website, viewed 28 Oct. 2014(Royal Dutch Shell plc; name registered 27 Oct. 2004; registered and trading address: Shell Centre, London SE1 7NA, United Kingdom; subsidiaries include: Royal Dutch Petroleum; and, Shell Petroleum N.V., parent of The Shell Transport and Trading Company Limited which itself is parent of The Shell Petroleum Company Limited)
found: Shell plc. Annual report and accounts for the year ended ..., December 31, 2021 (viewed online, August 15, 2023):PDF cover image (Shell plc) page 200 (company changed its name from Royal Dutch Shell plc to Shell plc on January 21, 2022)