Smith debuted for WWE on June 8, 2018, competing in a number one contender tournament for the WWE United Kingdom Championship, advancing in the first round after eliminating Joseph Conners. Two nights later, he returned, teaming with Dave Mastiff and defeating The Forgotten Sons (Steve Cutler and Wesley Blake) by disqualification. On June 18, Smith returned during the opening night of the 2018 WWE United Kingdom Championship Tournament, during which he was eliminated by Travis Banks. Smith made his official NXT UK debut on the October 24 episode, defeating Tucker. He returned on the November 7 episode, teaming with Flash Morgan Webster and Mark Andrews in a tag loss against The Coffey Brothers (Joe Coffey and Mark Coffey) and Wolfgang. The following month, Smith appeared on the November 14 episode, losing to Wolfgang. On the November 28 episode of NXT UK, Smith lost a match against Eddie Dennis. On the December 12 episode of NXT UK, Smith and Ligero lost a tag match to Gallus (Mark Coffey and Wolfgang).
On the June 2, 2022 episode of NXT UK, Smith and Oliver Carter won the NXT UK Tag Team Championship by defeating previous champions Moustache Mountain (Trent Seven and Tyler Bate) and Die Familie (Teoman and Rohan Raja) in a triple threat match. On the June 23 episode of NXT UK, Carter and Smith were set to defend their titles against NXT 2.0's Josh Briggs and Brooks Jensen, but Smith suffered a knee injury and had to vacate them.
On August 18, 2022, Smith was released from his WWE contract.