Labour MP Tom Blenkinsop has confirmed that he will not seek to retain his seat when the country heads to the polls for Prime Minister Theresa May's early election.
Blenkinsop has represented the seat of Middlesbrough South and East Cleveland since 2010, but as a centrist member of the Labour party he has been a long-term critic of leader Jeremy Corbyn.
His decision follows the resignations of Stoke MP Tristram Hunt and Copeland MP Jamie Reed, who both quit parliament earlier this year.
In a statement, Blenkinsop blamed "significant and irreconcilable" differences with Corbyn.
Labour was struggling at historic polling lows in the run-up to this morning's announcement from Theresa May, and even last year experts were predicting the party could be decimated in an early ballot.