#5 Mark Andrews
NXT UK started with a bang back in early 2017, and it was a small group that carried the flag until NXT UK was officially announced, and of that group, Mark Andrews is the only one to not taste NXT success. Moustache Mountain have won titles on their own and as a team, Pete Dunne is reigning as NXT UK Champion and James Drake is currently one-half of the NXT UK Tag Team Champions, but White Lighting has been left behind.
The company haven't had much for him to do, and even a relationship with Flash Morgan Webster hasn't helped his cause too much, but as a singles competitor, Andrews has so much potential.
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He doesn't have the jaw-dropping aerial arsenal of someone like Will Ospreay or Ricochet, but Andrews can fly with the best of them, and if the WWE give him a chance, the entire world would enjoy watching his 'high-fives and stage dives'.