At the 2012 GB Rowing Team Senior Trials held on 10/11 March at Eton/Dorney, Constantine and George Nash came third in the men's pair.

At the 2011 World Rowing U23 Championships, Constantine and crewmate George Nash raced in the men's pair. The duo dominated all of their races, winning gold in the final over 5 seconds ahead of the silver medallists from Russia.

At the 2011 GB  Rowing Team Senior Trials held on 16-17 April at Eton/Dorney, Constantine took 4th place in the men's pair with George Nash. Also with George Nash, at the 2011 Lucerne World Cup, Constantine narrowly missed out on a place in the A final of men's pairs and then won the B final ahead of Germany to achieve a world ranking of 7th.

Constantine was the youngest member of the victorious Oxford crew in the 2011 Boat Race in March at 19.

In his first season as a member of the GB Rowing Team U23 squad, Constantine raced in the men's four at the 2010 World Rowing U23 Championships in Brest, Belarus and won a silver medal.  This boat was formed after Henley and was made up of four Junior gold medallists from GB's successful coxless fours from 2006/07/09.  Earlier that year Constantine won gold in the men's four at the Duisburg Regatta and was again a member of the Eton crew which took the Princess Elizabeth Challenge Cup at Henley Royal Regatta, having previously won the cup in 2009. 

Constantine started rowing at Eton in September 2007, basically because he was rubbish at cricket.  He did however soon realise that he had made the right choice.  As a junior he had a very successful 2009 season, gaining a gold medal in the men's four at the World Rowing Junior Championships in Brive-la-Gaillarde, after winning gold in the four and the eight at the Munich International Regatta. 

Constantine is studying Classics at Oxford University.  When not rowing, he enjoys music - he plays guitar - and reading.

He is Lottery funded through UK Sport.