The lawyer who prosecuted a Norfolk sub-postmistresses falsely convicted in the Horizon scandal has been quizzed in a public inquiry. 

Rob Wilson was asked to explain the actions he took against Allison Henderson, who worked at Worstead Post Office when she was wrongly accused of stealing money from the branch in 2010.

But rather than theft, the faulty accounting system Horizon was behind the missing money, in the case of Mrs Henderson and hundreds of other Post Office workers across the country. 

Correspondence from Mr Wilson during his prosecution read: “The defendant is not disputing that £11,957.78 appears to be missing from the Worstead sub post-office, where she was sub postmistress.

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“The defendant offers no particular explanation and does not understand why there is a discrepancy, however does believe that any discrepancies are the result of a malfunction of the Horizon computerised accounting system. 

“The defendant also believes that any discrepancy could have been discovered by the Post Office auditor, particularly as he initially alleged £18,000 was missing, this was reduced to the alleged sum in a matter of minutes. 

“Further investigation by the auditor would have discovered the whereabouts of the alleged missing sum.” 

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A letter was sent to Mrs Henderson’s lawyer on November 16, 2010 asking if she would accept a guilty plea for false accounting as well as repaying the £11,957.78 she was wrongly accused of stealing.

She was also told that she could not mention any problems with Horizon in court.

Mrs Henderson has been approached for comment. The public inquiry is ongoing.