Liberal Democrat party leader Nick Clegg said he was "shocked and saddened" by Chris Huhne's guilty plea but said he had "taken the right decision in resigning as an MP".
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A plan to secure the future of Port Talbot steelworks will be unveiled to staff on Wednesday, ITV News understands.
The 54-year-old, who has been in office since April 2014, will stand down from his role as Prime Minister to focus on his campaign.
US comedian and talk show host Jimmy Kimmel is to host the 2017 Oscars ceremony, according to reports.