Matthew won two golds, two silvers and one bronze medal at the European Championships.  His highlight was becoming European 400m Champion in Munich in 2018 having placed 2nd in Zurich in 2014.  He qualified for the final of the 400m at the 2016 Olympic Games in Rio and was part of the winning 4x400m team at the 2014 Commonwealth Games and bronze medal wining team at the 2017 World Championships.