When the preparations for the Melbourne race began De Havilland got a mysterious visitor. The man stated that he had heard of the construction of the Comets and ordered De Havilland to build a fourth aircraft for an undisclosed customer. This mystery customer wanted to participate in the race. De Havilland built the aircraft in a separate production hall to prevent the any publicity. The aircraft was painted dark blue and registered as G-ACSQ in the British aircraft register.
The aircraft was entered in the race under number 25 under the greatest of secrecy. It was rumored at the time that the pilot and owner of the aircraft was a member of one of the European royal families who loved flying but was prohibited in taking risks as involved in the race. This rumour was confirmed by the alleged name of the plane: "Royal Blue".
The aircraft was kept in a hangar at Mildenhall until all the other aircraft had left. It took off three hours after the last official participant in the race. The aircraft is alledged to have made an emergency landing in Egypt, its occupants escaping safely but the aircraft was lost in a fire resulting from the landing.
The pilot and navigator were rescued from the desert and flown back to Europe four days after they had taken off from Mildenhall.
Although much research has been done only one photograph of Royal Blue has been found so far.
Last updated: 30/12/2007