Fast food giant Pizza Hut has launched an investigation into allegations a pizza was delivered from its Downham branch with a metal nut and bolt inside the box.

The rogue ‘toppings’ were lying on a pizza delivered from the chain’s branch on Bromley Hill on Friday, it is claimed (June 5).

Charity boss Jane Plumb posted a nauseating photo of the nut and bolt atop the pizza, which was also laden with red onions, mushrooms and sliced black olives.

Ms Plumb, medical charity Group B Strep Support’s chief executive, wrote alongside the photo: “Found a nut and bolt in pizza delivered by Pizza Hut Downham yesterday – @pizzahutuk.

“No comment yet from store.”

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She also posted on Twitter that the pizza had been ordered by colleague Susan Gregory, the charity’s chair.

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A Pizza Hut spokesperson said: "We’ve spoken to Mrs Gregory and take her complaint very seriously.

“We launched an immediate investigation, which is underway, and can’t comment until this has been concluded."

News Shopper has not yet been able to reach Ms Plumb or Mrs Gregory for comment.