More than 700 sub-postmasters were handed criminal convictions between 1999 and 2015 after faulty software wrongly suggested the employees were stealing money.

More than one million people have signed a petition calling for Vennells to be stripped of her CBE, an award she was given for services to the Post Office.

Vennells oversaw the Post Office as the Horizon scandal unfolded and repeatedly denied problems with the system.

Yesterday, Sunak confirmed that Justice Secretary Alex Chalk is considering plans to exonerate all 700 subpostmasters convicted in the scandal.

Just 93 people have so far been pardoned for the convictions, which were handed out between 1999 and 2015.

Victims of the Horizon Post Office scandal have demanded Liberal Democrat leader Ed Davey resign as fresh revelations emerge over his role in the saga.

Davey served as Minister for the Post Office between 2010 and 2012 in the coalition government.

He is being accused of having turned down a meeting with campaigner and former sub-postmaster Alan Bates while he fought for justice for postal workers.

But the Lib Dem leader has attempted to distance himself from the scandal, claiming he was “deeply misled” about the situation during his time as post office minister.

Davey, along with several other ministers, faced repeated warnings about the accounting problems and issues with the software.

A spokesperson for the Lib Dem politician said he “bitterly regrets” that the Post Office was not honest with him.

They added that “in hindsight”, Davey wishes that he could have done more.

Ex-postmistress Sally Stringer called for a “concerted effort to get the responsible individuals”, claiming that the root of the scandal “goes back to ministerial decisions” – some of which she described as being “wicked”.

Giving evidence to the ongoing public inquiry, Stringer said: “There has to be a concerted effort to get the responsible individuals.