The pilot of VH-CYT landed the aircraft on runway 35. On the landing roll he asked the tower for clearance to turn left into runway 12/30. Because another aircraft, VH-CSZ, was about to land on runway 12 the air traffic controller told the pilot of VH-CYT "negative, continue through the intersection without delay". The pilot of VH-CYT misunderstood the instruction and turned left into runway 12/30. VH-CSZ had already been cleared for a touch-and-go landing on runway 12 and was already on the ground when VH-CYT turned left. The controller issued instructions to both aircraft to stop. They both came to rest on the runway, with about 350 metres space between them. Significant Factor The following factor was considered relevant to the development of the incident: 1. The pilot of VH-CYT misunderstood the instruction given by the tower controller.