But Shadow Chancellor Mr McDonnell said the decision to let the Blairite peer remain a Labour member displayed double standards when veteran union boss Ronnie Draper - a Jeremy Corbyn supporter - had been blocked
from voting in the leadership contest for comments he made on Twitter.
Yet, even with the influx of all these new people after the election, the membership
which voted in the leadership contest probably looked pretty similar, and thought pretty similarly, to the membership that had campaigned for a Labour victory in May 2015.
In the interview with the Observer Mr Corbyn also offered his first public comments on the Court of Appeal's judgement to bar around 130,000 members from
voting in the leadership contest in a ruling which upheld the initial decision of Labour's ruling body.
He began saying how proud he was that 560,000 people had signed up to
vote in the leadership contest — although he did not mention entryism or the shambles of the registered - supporters provision.
In his written judgment, Mr Justice Hickinbottom stated: «At the time each of the claimants joined the party, it was the common understanding as reflected in the rule book that, if they joined the party prior to the election process commencing, as new members they would be entitled to
vote in any leadership contest.
If they opt in to this they will be attached to a constituency party, with the right to
vote in leadership contests.
Labour's acting leader Harriet Harman has said that party officials are «rigorously, robustly and fairly» verifying those applying to
vote in its leadership contest.
Corbyn has majority support among all three groups of people that are eligible to
vote in the leadership contest.
He argued when people joined they were told «very clearly» they would be able to
vote in the leadership contest and «to deny them that democratic right flies against all the traditions of our party».
Updated data was presented to the NEC on Tuesday, but it is hard to know if those failing to renew their membership are supporters of Corbyn who joined to
vote in the leadership contest, or his opponents who do not like the direction the party is taking.
Labour's acting leader has said that party officials are «rigorously, robustly and fairly» verifying those applying to
vote in its leadership contest.
Last night a spokesman for Jeremy's leadership campaign, said:» This result clearly shows that there is a desire for real and genuine change in our party under the continued leadership of Jeremy Corbyn, but we are not going to take anything for granted and we will be campaigning for
every vote in the leadership contest.»
As the 640,000 members and supporters of Labour prepare to
vote in the leadership contest, they have to decide between power and principle.
On 24 September, the Huffington Post reported that Unite had signed up 2,700 Unite members to the political levy, allowing them to
vote in the leadership contest.