[5] Brett's greatest achievement before 2016 was winning the 2014 World Indoor Bowls Championship Pairs title partnering Greg Harlow.

[7] Brett followed up his 2016 success by winning the mixed pairs title at the 2017 World Indoor Bowls Championship with Claire Johnston of Scotland.

[8] He then joined an exclusive group of players who have won five or more world indoor titles after winning both the open pairs and mixed pairs at the 2020 World Indoor Bowls Championship[9][10] and he narrowly failed to become the first player to win the treble after losing to Paxton in the open singles final.

[15] At the 2023 World Indoor Bowls Championship, Brett won the Open Pairs with Greg Harlow again, defeating Jason Greenslade and Michael Stepney in the final.

[4] Due to injury in 2021 he was unable to compete in the World Indoor Championships and consequently joined the commentary team for the event.