Aminur Nadir Khan, 20, Ali Akbar Choudhury, 20 and Mashudur Rahman, 22, will serve a minimum of 23 years for the murder of Ajmol Alom.
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A man has died following a stabbing at a south-east London chicken shop. Police said two men were found with head and stab wounds.
The couple’s split was announced in April.
Two 16-year-old boys have been charged with murder after a teenager was stabbed to death outside a KFC in central London.