Mr Clark denies acting improperly but later resigned, saying his position had been made "untenable".

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The employee was sacked, reinstated on appeal, but later resigned.

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Mr Mitchell has repeatedly denied claims, first reported in the Sun, that he swore and called police officers 'plebs' but he later resigned as chief whip.

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He remained with the company following the 2010 buyout, but resigned later that year, to be replaced internally.

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He was re-elected in November but resigned a few weeks later.

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He was swiftly recaptured, but Belgium's police chief, justice minister and interior minister later resigned.

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Gordon ended up returning to work after another employee mediated, but the environment remained unfavorable, and she resigned a few months later.

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