Student and instructor run out of fuel upon landing

An instructor and a Student pilot on-board a Cessna 172 aircraft with registration ZA2-FN took off on a solo cross-country navigational flight from Charles prince airport. They flew from Charles prince to Robert Mugabe international airport, where he performed a touch-and-go landing; from there they flew to morning side farm aerodrome, whereafter they returned to Charles prince with the intention to perform a full stop landing. Following radio communication with air traffic control (ATC) at Charles prince, the aircraft was cleared to land on Runway 09. They were number two for landing. An aircraft in-front of them expedited upon landing and taxied off the runway. On final approach they stated that the engine started running rough and later stopped. They then attempted to restart the engine and it cranked about the three times, but did not restart and they cut the engine. They then opted to do a forced landing on an open field the instructor had identified from the air. Prior to conducting a forced landing, the student pilot had broadcasted on the Charles prince tower, “May day May Day May Day I have engine failure, ZA2-FN”. The air traffic control (ATC) replied; “Continue with the approach for Runway 09”, whereupon the student pilot replied; “Copy continue Runway 09”. There was no further communication between the student, instructor and ATC. During the forced landing, approximately 45m after touchdown on the open field, the aircraft collided with a concealed embankment of about 90 centimetre (cm) in height. The aircraft’s nose wheel broke off and the aircraft nosed over and came to rest in an inverted attitude approximately 1. 2 nautical miles (nm) from the threshold of Runway 09. Paramedics responded to the scene and both the student and the instructor came out with minor injuries and the small aircraft was found in the field damaged. . Following civil aviation authority (CAA) it was shown that the student forgot to tightly close the fuel cap upon refuelling which lead to the fuel leak during the flight, which caused the small aircraft to run out of fuel prior to the engine failure