What was the name of the British ship that was used as a Red Cross hospital?

The Brittanic.

More info on Hospital Ships of WW2---mainly US. In 1942, mental and litter patients only travelled on British or Canadian Hospital Ships, as the United States had no such vessels at their disposal. Ambulatory patients to be returned to the ZI, and who could care for themselves, crossed the Atlantic on returning American Troopships OR British fast liners such as the 'Queen Mary'or the 'Queen Elizabeth'! Above was quoted from the following website. http://www.med-dept.com/hosp_ships.php Another link to the same website with names of US Hospital Ships:

http://www.med-dept.com/eto_hosp.php#hosp_ship