Balfour Beatty has won a contract worth £154 million to transform the Olympic Stadium in east London.
Last summer, Balfour was awarded the contract to convert the stadium roof and will now lead the remainder of the transformation work.
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Assema Kedir Habib spoke at the commemoration of her brother Hashim Kedir and his family.
A 95-year-old man has been arrested on suspicion of murder after a 61-year-old female carer died after she suffered head injuries.
The man told his pensioner victim his floor needed replacing and offered to carry out the work.