Harriet Harman, Labour's deputy leader, is to be prosecuted over her involvement in a car accident in her south London constituency in July.
The leader of the Commons is alleged to have crashed her car into another vehicle while talking on her mobile phone in Dulwich, south London, on 3 July.
The Crown Prosecution Service said there was "sufficient evidence" and that it was in the public interest to summons her to court, where she will be charged with driving without due care and attention and driving whilst using a hand-held mobile phone.
A spokeswoman for Harman, 59, said she "strongly refutes the allegations and will deny the charges".
A witness reported that after the accident Harman wound down her window and said: "I'm Harriet Harman, you know where you can get me.''
If found guilty of driving while using a mobile phone, Harman faces three points on her licence and a £60 fine. Driving without due care and attention is punishable by a fine of up to £5,000 and between three and nine penalty points.
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