23 of the 25 affected restaurants are from the Jamie's Italian chain.
The restaurant group of celebrity chef Jamie Oliver went into administration, putting up to 1,300 jobs at risk.
As BBC reports, Oliver said he is "saddened" after his restaurant group went into administration.
The group, which includes the Jamie's Italian chain, Barbecoa and Fifteen, has appointed KPMG as administrators.
Of the 25 restaurants are affected by the move, 23 were from the Jamie's Italian chain.
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