RMS (later HMT[a] Royal Edward was an ocean liner of the Canadian Northern Steamship Company that was sunk in the First World War with a large loss of life while transporting Dominion troops.

Cairo and sister ship Heliopolis were built by the Fairfield Shipbuilding and Engineering Company of Govan, Scotland.

[8] On the morning of 13 August, Royal Edward passed the British hospital ship Soudan, heading in the opposite direction.

He allowed Soudan to pass unmolested, and focused his attention on the unescorted Royal Edward some 6 nautical miles (11 km) off Kandelioussa.

[9] Royal Edward was able to get off an SOS before losing power, and Soudan arrived on the scene at 10:00 after making a 180° turn and rescued 440 men in six hours.

[13] An Admiralty casualty list, published in The Times in September 1915, named 13 officers and 851 troops as missing believed drowned, a total of 864 lost, including posthumous Victoria Cross recipient Cuthbert Bromley and footballer Walter Miller.