James Halliwell signed professionally for the Bristol Bears ahead of the 2022/23 season after an impressive campaign with the England U18s team at the 2022 Six Nations Festival.He made his club debut against Exeter in Round two of the Premiership Rugby Cup in September 2022, before being named in the England squad for the 2023 U20s Six Nations Championship. Halliwell retained his place for the 2023 World Rugby U20 Championship in South Africa. He was named in Mark Mapletoft's Elite Playing Squad for the 2023/24 season and featured in the squad that won the 2024 U20 Six Nations, scoring a try in the deciding game against France in the final round. James was recently named in Mapletoft's 30-player squad for the 2024 edition of the World Rugby U20 Championship in South Africa.