The Co-operative Bank has reported an annual loss of £1.3 billion for the 2013 financial year.
The Co-op group was plunged into fresh difficulties on Thursday, offering members a vote on its future after the resignation of senior independent director Lord Myners.
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The talks descended into crisis on Friday when Canada's trade minister Chrystia Freeland walked out of meetings.
Police in New York are still investigating what the substance is and whether it could be harmful.
The Sherlock actor made the comment while he received an award for his humanitarian work.