He later played for Wales in the 1979 ICC Trophy, a qualification tournament for the 1979 World Cup. He made three appearances during the tournament, against the Netherlands, Israel and the United States. He scored 3 runs in Wales' opening match victory against the Netherlands, while against Israel he scored 11 runs in another Wales victory. In a narrow eight run defeat to the United States, Ellis scored 56 runs. This was Wales' only appearance at the ICC Trophy, one from which they failed to qualify for the World Cup.