James McGuire from Harrow Weald in North London, has a two-year-old daughter, Sophie, who will take part in the trial.

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"In some cases, we can get four football fields of skin out of one baby foreskin, " said Dr. James McGuire, head of wound management at the Foot and Ankle Institute at the School of Podiatric Medicine at Temple University, in Philadelphia.

CNN: Lab-created skin helps wounds heal

But referee Ben Thaler referred the try to video referee Richard Silverwood, who deemed that the Crusaders' Jordan James had purposely collided into Danny McGuire in the build-up to the score.

BBC: Leeds 28-6 Celtic Crusaders