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It was an accident waiting to happen, but the search for the Higgs boson particle has finally tossed up something wonderful.

Despite being one of the most complex machines ever built, the Large Hadron Collider has always been just a couple of letters away from a dodgy penis joke.

The particle collider in Geneva, Switzerland, was started up for the first time since 2013 this weekend - as part of its continued quest to prove the existence of the Higgs boson particle.

(Image: BBC / You Tube)

BBC News' coverage of the event managed to mark the occasion with an unfortunate spelling error - switching the 'r' and the 'd' around in the word Hadron.

A banner hilariously read "HARDON COLLIDER RESTART" at around 8.15pm yesterday evening.

The Twitter account @FatkeBottas wrote: "Well, the "large hardon collider" just made its appearance on @BBCNews. Not even kidding.

"Pretty sure the sport lady noticed, huge grin."

Another user, Wendy Morrison, joked: "That ought to get a rise out of people."