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i ate it as i thought it may have been something used on another process of pizza as sometimes you get cheese and tomato pizza with a few herbs sprinkled on the top, i thought it may have been this, obviously not. when i tasted it it was spat out straight away.
anyway, i contacted customer relations, they are sending me some packaging to send the pizza to them to investigate, but i'm sending 1/2 as i'm keeping the other 1/2 to send off to food standards agency if i disagree with their findings.