Prosecutors are considering whether charges should be brought over the "Plebgate" investigation after receiving all outstanding evidence in the case, a Crown Prosecution Service spokesman has said.
Eight people, including five police officers, are currently on bail while the police investigation continues into Mr Mitchell's resignation
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The Conservative and Labour leaders are expected to use PMQs on Wednesday to push their main campaign messages.
Surrey Police has been criticised for handing back John Lowe his shotguns months before he went on to shoot his partner and her daughter.
Figures suggest that more than 11 million homes, or 42%, are in credit to their energy company.