The 2018 United Kingdom Championship Tournament was a two-day professional wrestling streaming event and tournament promoted by the American promotion WWE. The tournament aired exclusively on the WWE Network and featured wrestlers from the NXT UK and NXT brand divisions—the first event to officially promote NXT UK. The event was filmed on 18 and 19 June 2018 and aired on tape delay on 25 and 26 June. It was held at the Royal Albert Hall in Kensington, London, England.

NXT UK was a brand of the American professional wrestling promotion WWE that was introduced in December 2016. Brands are divisions of WWE's roster where wrestlers are assigned to perform on a weekly basis. Wrestlers assigned to NXT UK primarily appeared on the brand's weekly television program, NXT UK, and the brand's periodic livestreaming events. The brand served as a sub-brand of WWE's developmental territory, NXT, with NXT UK wrestlers also occasionally appearing on its show, NXT, as well as NXT's major events. Unlike WWE's other brands, NXT UK was produced exclusively in the United Kingdom and was specifically centered on wrestlers from the country.