More than 2,100 jobs have been saved by Sports Direct International's purchase of 116 stores from fashion retailer Republic.
The Sports World group has also taken over the stock, along with the group's head office in Leeds and its websites and brands SoulCal, Fabric and Crafted.
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"My sincerest apologies to everyone who purchased tickets and were planning to come to the upcoming shows."
His comments at the Defence and Security Forum on Monday came after a £20 billion black hole in the budget for the next decade emerged.
The Foreign Secretary said he thinks the health service should be "at the very top of the list" for a windfall after the UK leaves the EU.