Join the Secret Elves to discover the best shopping deals and things to do this ChristmasMcDonald's has warned customers it may soon run out of some ingredients due to Brexit.Posters have been spotted outside selected McDonald's restaurants across the UK warning customers that the likes of tomato and lettuce might be off the menu.Snaps of the sign were shared on on social media, sparking desperate reactions.The poster photographed on restaurant windows and drive thru boards, reads: "Due to supply challenges following Brexit, some of our menu may be unavailable or have ingredients missing, e.g.
Lettuce, Tomato."The sign concludes: "Please ask a member of staff for further details."One Twitter user captioned a photo of the sign saying "So it.
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