There were indications before the sell-off of Royal Mail began of demand "really taking off", according to the chair of the business, innovation and skills select committee.
Labour's Adrian Bailey dismissed claims criticism of the sell-off was all in hindsight and told Good Morning Britain the Government failed to act on clear signs of high demand for shares.
"There were indications before the float that demand for these shares were really taking off. Institutional investors over-subscribed it by 24 times and retail investors...by seven times."
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Former Work and Pensions Secretary Iain Duncan Smith has David Cameron should remain prime minister even if Britain votes to leave the EU.
Tony Blair has said Leave campaigners are focusing on immigration "because they've lost comprehensively the debate on the economy".