A committee of MPs says the taxpayer missed out on an extra £1 billion when Royal Mail was privatised last year.
The Commons business select committee says shares were undervalued, but Business Secretary Vince Cable dismissed the findings as "hindsight".
ITV News Political Correspondent Libby Wiener reports.
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Responding for the first time to recent questions over the death of a steward, Walsh insisted the evidence said cabin air was safe.
The man identified as the Islamic State militant known as "Jihadi John" was a "popular" schoolboy who loved Manchester Utd and S Club 7.
Everton, the only British side left in the Europa League, have been handed a tough tie against Dynamo Kyiv in the last 16 round