In 2013 Vernon again did not compete in the World Cross Country Champions and his only major competition for the year was the 2013 European Cross Country Championships where he finished third in the senior men's race behind Alemayehu Bezabeh of Spain and Turk Polat Kemboi Arıkan. In 2014 Vernon didn't compete in either of the major cross country championships. Instead he competed at the 2014 European Athletics Championships, the 2014 Commonwealth Games and the 2014 IAAF World Indoor Championships. At the European Athletics Championships Vernon won two medals. He won a silver medal in the men's 10,000 metres and a bronze medal in the men's 5000 metres. Vernon competed in the 5000 metres at the Commonwealth Games and finished sixth. Competing at his first World Indoor Championship, Vernon finished 11th in the 3000 metres. He ran his personal best of 27:42 in the 10,000 metres in May 2015, in Palo Alto, USA. The 2015 European Team Championships was Vernon's only major competition in 2015. He competed in the 5000 metres, finishing third behind Frenchman Morhad Amdouni and Jesús España. In 2016 Vernon competed at his first Summer Olympic Games. Vernon qualified for the 10,000 metres at the 2016 Summer Olympics. In the event he finished 25th out of 34 starters in a time of 28minutes and 19.36seconds. Upon winning the half marathon Great Birmingham Run in October 2016, Vernon said he hopes to add the marathon to his repertoire and qualify for the 2020 Summer Olympics.