A former Post Office boss who congratulated colleagues after a sub-postmaster was wrongly convicted will give evidence to the inquiry today.

David Smith was appointed managing director in April 2010 and left less the role just eight months later in December.

His tenure oversaw the conviction of pregnant sub-postmistress Seema Misra, who was handed a 15-month sentence after being blamed for £74,000 worth of shortfalls.

It was previously reported that Mr Smith celebrated her imprisonment in an internal email which described the update as “brilliant news”.

This afternoon, the inquiry will hear from Sir Michael Hodgkinson, who became the first chairman of Post Office Ltd when he took on the role in April 2012.

More than 900 sub-postmasters were wrongfully prosecuted as a result of the Horizon scandal, which saw them blamed for non-existent shortfalls produced by faulty software.

Yesterday, the inquiry heard how former chief executive Paula Vennells suggested shortfalls were down to the “temptation” to steal from the tills.

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