The Co-operative Group has reported annual losses of £2.5 billion, the worst in the company's history.
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Gordon Brown has said forced child migration schemes that continued until the 1970s amounted to "government-induced trafficking".
200 UK officers already working on the case are sifting through 15 tonnes of debris on each of the building's 24 floors.
Levels of crime - including violent offences - saw their most dramatic rise in a decade last year, new figures show.