McDonald's fans are being warned by the global fast food behemoth that their burgers now contain traces of nuts and peanuts.
The golden arches are spread across Cambridgeshire, with two in the city alone, and another at the A14 services, as well as one each in Ely, Newmarket and Huntingdon.
Signs have been put up in a number of McDonalds 1,274 stores saying: "Please be aware that our buns and English breakfast muffins may contain nuts and peanuts until further notice."
It is not clear how many stores have been affected – but complaints have flooded into social media from London and Canada.
Charlo Folland wrote: "Very disappointed to learn today that your burgers no longer cater for people with nut allergies due to the buns now carrying the nut warning. Yet another food chain who are failing to support those with allergies."
The Mirrorreports major changes have been made to some of the restaurant's most popular items.
Fiona Hunter wrote: "So annoyed and upset for kids with severe allergies who now cant eat here!
"Why do u need nuts on buns anyways?! And cross contamination too .. (Im gutted as I cant get my favourites either.. severe nut allergy – not worth the risk!) (sic)"
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Angela Shosenberg tweeted McDonald's Canada saying: "We can't eat at McDonald's anymore because of the addition of NUTS to the menu. Very disappointing for a family friendly resaurant."
From London, a Twitter user calling themselves Moli, tweeted a picture of one of the notices that went up this week.
He wrote: "Another reason not to eat McDonald's. The buns and muffins might contain nuts or peanuts."
And Alex wrote: "MACCIES BREAKFASTS MAY CONTAIN NUTS TIL FURTHER NOTICE WHAT ??? am offended with my fellow nut allergy suffers. (sic)"
But Angela Waters praised the company for how it alerted customers, writing: "We hope this is a very temporary problem.
"We appreciate the warnings over May Contain'. You are so allergy aware it's great – We dont appreciate hidden may contain nut warnings."
A McDonald's spokesman told the Mirror Online: “We have been made aware that traces of nuts and peanut may have entered our supply chain and come into contact with the buns and English breakfast muffins served in some of our restaurants.
“We have already introduced clear signposting in the restaurants affected at the front counter, on self-order screens, at drive-thru and on the click & collect and UBEREATS McDelivery apps. Anyone with any concerns should speak to the restaurant team or contact customer services. We have also notified Anaphylaxis Campaign who has alerted its members.
“The health and safety of our customers is our absolute priority, and this is a temporary issue which we are working to rectify as quickly as possible.”
Anaphylaxis Campaign shared a message on their website , reportedly funded by the fast food chain.
It said: "We have been alerted by McDonalds UK that traces of nuts and peanuts may have come into contact with the Buns and English Breakfast Muffins served in some of their restaurants.
"Clear signposting is already in place in the restaurants affected at the front counter, on self-order screens, at drive-thru, on the click & collect and UBEREATS McDelivery apps.
"This is a temporary issue and it will be communicated by alert from us when resolved."
Anyone with concerns should speak to the restaurants team or contact McDonalds customer services 0370 524 4622