[4] He made his Newcastle debut in the Premiership Rugby Cup against Northampton Saints in March 2022.
[5][6] In October 2022, he scored a last minute conversion to seal a 32-31 win over Leicester Tigers in the Premiership Rugby Cup.
[7] In April 2024, having made 16 league appearances for Newcastle, Johnson was announced to be joining Saracens on a long-term contract.
[9] He played for England at the 2023 World Rugby U20 Championship, starting the semi-final defeat against France.
[11] He also featured in their last fixture of the tournament which saw them lose to hosts South Africa to finish fourth.