She claimed Mr Corbyn was now not only mimicking the "inflammatory language" of Ukip and the Conservatives on immigration but also seemed unaware of the distinction between single market membership and European Union membership. That's an interpretation that's been put on the referendum result by the current UK Government and that makes no sense at all'.
He said: "He is parroting the lie used by leading Brexiteers that membership of the Single Market is the same as staying in the EU".
"We never said we would completely abolish it because we were unaware of the size of it at the time", he added.
Corbyn told Andrew Marr on Sunday: "I recognised it was a huge burden, I did not make a commitment we would write it off because I couldn't at that stage".
He told BBC Radio 4's Westminster Hour: 'If you do what Norway does, what happens is the very reasons that most people who voted leave, voted to leave - namely to regain sovereignty, to regain control of our borders, not to pay money into the European budget - all are not achieved.
Responding to Mr Gardiner's comments directly, fellow Labour MP Wes Streeting said: "Where has this come from?" "You don't have to leave the European Union and leave one of the world's biggest markets at the same time".
During the general election Corbyn said that he was "looking at ways" to reduce the tuition fee debt of former students and said to NME in relation to those with existing student debt: "Yes, there is a block of those that now have a massive debt, and I'm looking at ways that we could reduce that, ameliorate that, lengthen the period of paying it off, or some other means of reducing that debt burden". We were told customs union is still on the table.
"For someone who has spent his entire life, starting in the 1970s starting with the Bennite campaign for Labour democracy, who's ramping up again talk of reselection of MPs, to blithely disregard the views of members, is an extraordinary act of hypocrisy". Former frontbencher Chuka Umunna said some countries were outside the European Union but inside the single market, including Iceland, Lichtenstein and Norway.
As a member of the Labour party, we have a policy, endorsed at the party conference past year.
Corbyn added that his party had not decided whether it would keep Britain inside the customs union, having not "jumped on either side of that fence".
It forced Mr Corbyn to sack three front benchers and a fourth resigned.