2014

In March, Methuen won silver behind Latalia Bevan in the Espoir division of the Welsh Championships ^[2] and went on to be crowned the 2014 British Espoir Champion later that year.^{[3] [4]}

2015

Methuen won gold in the junior all-around at the 2015 Welsh Championships,^[5] and placed second behind Catherine Lyons in the junior division at the 2015 British Championships.^[6]

Representing Great Britain at the 2015 European Youth Olympic Festival in Tbilisi, Georgia, Methuen won a silver medal on balance beam.^[7]

2016

Methuen was crowned the 2016 British Junior Champion.^[8]

At the 2016 European Women's Artistic Gymnastics Championships, Methuen won a silver medal with the team in the team final,^[9] placed fourth in the junior all-around final.^[10] She also qualified to the junior balance beam final where she placed fifth.^[11]

2017

In her first Senior British Championships, Methuen won floor exercise gold.^[12] She won joint silver, with Alice Kinsella, in the all-around competition, with both gymnasts scoring 53.300.^[13]

Methuen also placed second all-around in her first Senior Welsh Championships. ^[14]

2018

In 2018, at the British Championships, Methuen placed seventh all-around, ^[15] and won a gold medal on balance beam.^[16]

Methuen was selected to represent Wales at the 2018 Commonwealth Games in the Gold Coast, Australia.^[17] Methuen placed fourth with the Welsh team in the team final and placed seventh individually in the all-around final.^[18]