The director of Labour Future UK has claimed the seven Labour MPs who resigned from the party today have "ended any future political career" they might have had.
Brendan Chilton appeared on the Mike Graham show to discuss the news that Luciana Berger, Chris Leslie, Angela Smith, Gavin Shuker, Mike Gapes, Ann Coffey and Chuka Umunna had quit Labour due to an "appalling culture" and "antisemitism".
"These people have ended any future political career they may have had," Mr Chilton told Toby Young, who was standing in for usual show host Mike.
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"Obviously some of them did not aspire to greater things - they had been there a long time - but some of the younger members like Chris Leslie and Chuka Umunna have put a nail in the coffin of the people's vote and their own careers," Mr Chilton said.
The seven-strong group will now sit in Parliament as an independent group of MPs.
"A lot of those MPs have not been supportive of Jeremy since the day he was elected as leader," Mr Chilton added.
"I don't think they're going to pose a serious threat to the Labour Party. The electoral base that would support them is very, very small."