Alys Thomas made her international debut at the Budapest 2017 World Championships after she defended her British 100m Butterfly title in Sheffield earlier that year. Since then she has gone on to claim accolades at both European Championships and Commonwealth Games.
2019 saw Thomas qualify for her second World Championships with double Gold across the 100m and 200m Butterfly at the British Swimming Championships. In Gwangju, she the made her first individual World Championships final with a 5th place finish in the 200m Butterfly.
The Glasgow 2018 European Championships saw Thomas serve up a duo of bronze medals in her solo specialism, 200m Butterfly, and the 4x100m Medley Relay.
Thomas delivered an impressive swim to claim her first international title in the Women's 200m Butterfly at the Gold Coast 2018 Commonwealth Games. She also picked up a bronze in the Women's 4x100m Medley Relay for Wales in the penultimate race of the swimming competition.
At the 2017 World Championships held in the Hungarian capital, she competed in the Women's 100m and 200m Butterfly events where she was a semi-finalist in both.
Thomas topped the podium for the second year in a row to win the Women's 100m Butterfly. She also collected two further medals, silver in the 200m Butterfly and bronze in the 50m Butterfly to round off a strong performance at the 2017 British Championships.
2016 saw a debut British title in Glasgow as she claimed the 100m Butterfly gold and followed that up with silver in the 200m event.
Thomas represented Wales at the 2014 Commonwealth Games in Glasgow and competed in the 100m and 200m Butterfly.
|4x100m Medley Relay||2017||3:59.51|
|100m Butterfly||2019 - Gwangju||59.25||24th|
|200m Butterfly||2019 - Gwangju||2:07.48||5th|
|4x100m Medley Relay||2019 - Gwangju||3:59.38||8th|
|100m Butterfly||2017 - Budapest||58.21||12th|
|200m Butterfly||2017 - Budapest||2:08.72||13th|
|4x100m Medley Relay||2017 - Budapest||3:59.51||7th|
|50m Butterfly||2018 - Glasgow||27.24||25th|
|100m Butterfly||2018 - Glasgow||58.44||9th|
|200m Butterfly||2018 - Glasgow||2:07.42||Bronze|
|4x100m Medley Relay||2018 - Glasgow||3:56.91||Bronze|
|50m Butterfly||2018 - Gold Coast||26.78||6th|
|100m Butterfly||2018 - Gold Coast||58.06||7th|
|200m Butterfly||2018 - Gold Coast||2:05.45||Gold|
|4x200m Freestyle Relay||2018 - Gold Coast||8:03.00||5th|
|4x100m Medley Relay||2018 - Gold Coast||4:00.75||Bronze|
|100m Butterfly||2014 - Glasgow||59.52||9th|
|200m Butterfly||2014 - Glasgow||2:08.62||4th|
|200m Freestyle||2019 - Glasgow||1:59.50||4th|
|100m Butterfly||2019 - Glasgow||58.20||Gold|
|200m Butterfly||2019 - Glasgow||2:07.40||Gold|
|50m Butterfly||2018 - Edinburgh||27.02||Silver|
|100m Butterfly||2018 - Edinburgh||58.91||Silver|
|200m Butterfly||2018 - Edinburgh||2:07.54||Gold|
|50m Butterfly||2017 - Sheffield||26.94||Bronze|
|100m Butterfly||2017 - Sheffield||57.85||Gold|
|200m Butterfly||2017 - Sheffield||2:07.87||Silver|
|100m Butterfly||2016 - Glasgow||58.66||Gold|
|200m Butterly||2016 - Glasgow||2:08.87||Silver|
|100m Butterfly||2015 - London||59.31||4th|