Question: Who designed the interior of the ocean liner that was the flagship of the Cunard Line from May 1936 until October 1946 when she was replaced in that role by "Queen Elizabeth"?

Context articles: RMS Franconia (1922)
RMS Queen Mary
Queen Elizabeth 2
RMS Queen Elizabeth
RMS Queen Mary 2
SS Ivernia
RMS Sylvania
Marion Dorn
RMS Aquitania
RMS Niagara

The RMS "Franconia" was an ocean liner operated by the Cunard Line from 1922 to 1956.
 She was second of three liners named "Franconia" which served the Cunard Line, the others being RMS "Franconia" built in 1910 and the third "Franconia" in 1963.
RMS "Queen Mary" is a retired ocean liner that sailed primarily on the North Atlantic Ocean from 1936 to 1967 for the Cunard Line (known as Cunard-White Star Line when the vessel entered service).
 Built by John Brown & Company in Clydebank, Scotland, "Queen Mary", along with  , were built as part of Cunard's planned two-ship weekly express service between Southampton, Cherbourg and New York.
 The two ships were a British response to the express superliners built by German, Italian and French companies in the late 1920s and early 1930s.
 "Queen Mary" was the flagship of the Cunard Line from May 1936 until October 1946 when she was replaced in that role by "Queen Elizabeth".
Queen Elizabeth 2, often referred to simply as QE2, is an ocean liner built for the Cunard Line which was operated by Cunard as both a transatlantic liner and a cruise ship from 1969 to 2008.
 She was designed for the transatlantic service from her home port of Southampton, UK, to New York, and was named after the earlier Cunard liner  .
 She served as the flagship of the line from 1969 until succeeded by  in 2004.
 Designed in Cunard's then headquarters and regional offices in Liverpool and Southampton respectively, and built in Clydebank, Scotland, she was considered the last of the great transatlantic ocean liners until the construction of the Queen Mary 2 was announced.
RMS "Queen Elizabeth" was an ocean liner operated by Cunard Line.
 With ""Queen Mary" " she provided weekly luxury liner service between Southampton in the United Kingdom and New York City in the United States, via Cherbourg in France.
 She was also contracted for over 20 years to carry the Royal Mail thus enabling her to carry the prestigious Royal Mail Ship (RMS) designation, as the second half of the two ships' weekly express service.
RMS "Queen Mary 2 (also referred to as the QM2") is a transatlantic ocean liner.
 She is the largest and only major ocean liner built for the British Cunard Line since "Queen Elizabeth 2" in 1969, the vessel she succeeded as flagship of the Cunard Line.
SS "Ivernia" was a British ocean liner owned by the Cunard Line, built by the company Swan Hunter & Wigham Richardson of Newcastle upon Tyne, England, and launched in 1899.
 The "Ivernia" was one of Cunard's intermediate ships, that catered to the vast immigrant trade.
 Together with her sister ship SS "Saxonia", the "Ivernia" worked on Cunard's service from Liverpool to Boston and then later on the immigrant run the Cunard Line had established from Fiume and Trieste to New York City.
RMS "Sylvania was an ocean liner built in 1957 by John Brown & Co (Clydebank), Glasgow, Scotland for the United Kingdom-based shipping company Cunard Line.
 She was the last Cunard Line vessel built specifically for transatlantic crossings.
 The ship was later heavily rebuilt as a cruise ship, and sailed under the names SS "Fairwind, SS "Sitmar Fairwind, SS "Dawn Princess and SS "Albatros before being scrapped in 2004.
 She was renamed SS "Genoa for her last voyage.
Marion Victoria Dorn also known as Marion Dorn Kauffer (born in Menlo Park, California on December 25, 1896—died in Tangier, Morocco on January 28, 1964) was a textile designer primarily in the form of wall hangings, carpeting and rugs, however she is also known to have produced wallpaper, graphics, and illustrations.
 Known for her significant contributions to modern British interiors in particular for her 'sculpted' carpets, she contributed to some of the best-known interiors of the time including the Savoy Hotel, Claridges, the Orion and the Queen Mary.
RMS "Aquitania" was a Cunard Line ocean liner designed by Leonard Peskett and built by John Brown & Company in Clydebank, Scotland.
 She was launched on 21 April 1913 and sailed on her maiden voyage to New York on 30 May 1914.
 "Aquitania" was the third in Cunard Line's "grand trio" of express liners, preceded by RMS "Mauretania" and  , and was the last surviving four-funnelled ocean liner.
 Widely considered one of the most attractive ships of her time, "Aquitania" earned the nickname "Ship Beautiful".
RMS "Niagara" was an ocean liner launched on 17 August 1912 and owned by the Union Steam Ship Company intended for the Australia-Vancouver, Canada service.
 She was nicknamed "the "Titanic" of the Pacific", but after the sinking of the real  this was dropped in favour of "Queen of the Pacific".
 She should not be confused with an earlier RMS "Niagara", an ocean liner built in 1848 for the Cunard Line.