|Born||July 24, 1992|
|Place of Birth||Waterford, Ireland|
|Coach||Hayley & Drew Harrison|
Thomas is the current Irish senior record holder for the 400m Hurdles (48.90) set in Geneva in 2014. He is a four time national champion in the 400m hurdles and has represented Ireland multiple times in underage and senior competition. Most recently he made the semi-finals in at the European Athletics Championships in Zurich. He placed eight at the U-23 European Track and Field Championships in 2013 and was also a semi finalist at the European Track and Field Championship in 2012. He is the younger brother of Olympian Jessie Barr, Thomas is studying a degree in Mechanical Engineering at the University of Limerick.
|European Senior Athletics Championships Zurich 2014 400m Hurdles||Semi-Finalist|
|European U23 Track and Field Championships Italy 2013 400m Hurdles||8th|
|European Track and Field Championships Helsinki 2012 400m Hurdles||Semi-Finalist|
|European Junior Track and Field Championships, Estonia 2011 400m Hurdles||6th Place|
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|12.02.2016||200||21.47||2||Irish Indoor University Championships||Athlone, IRL|
|18.08.2016||400H||47.97||4||31st Olympic Games, Olympic Stadium||Rio de Janeiro, BRA|
|04.02.2018||400H||50.50||1||AAI Indoor Games, National Indoor Arena, Abbotstown||Dublin, IRL|