The Shadow Chancellor will visit the SSI steel plant, which is set to close with the loss of up to 1,700 jobs.
John McDonnell told ITV News Tyne Tees' Political Correspondent Paul Brand, he would be making a trip up to Redcar "on Monday if not before".
He has said he plans to put "maximum pressure" on the Government to do more to help the stricken plant:
The factory is being shut down after Thai owner SSI said it had no other choice because of plummeting steel prices.
Jeremy Corbyn has attacked the Government's "failure" to intervene to save jobs at the Redcar steel plant, urging the Prime Minister to step in, as other governments have.
The Labour leader told the party's annual conference in Brighton that he stood with the people of Teesside, which is reeling from plant owner SSI's decision to mothball iron and steelmaking operations with the loss of 1,700 jobs.
- You can watch Mr Corbyn's full speech on ITV News.
Mr Corbyn said the Tories' economic policy worked for the few, not the many, while manufacturing continued to decline.
Look at the Tory failure to intervene to support the steel industry, as the Italian government has done. We stand with the people of Teesside, fighting for their jobs, their industry and their community. I call on David Cameron, even at this late stage, to step in and defend these people, just like the Italian government has done."
Corbyn says even at this late stage it's not too late for PM to step in and save SSI. Asks 'what is wrong with British govt?!' #lab15
Thai company SSI has blamed plunging steel prices for the job losses, which unions warned would deal a "devastating" blow to Teesside and the wider economy.
As well as the 1,700 direct job cuts, thousands of contractors and other workers depend on the Redcar site, where consultations on the redundancies started today.
The Government has set up a taskforce aimed at helping those who will lose their jobs.
Ronnie Campbell MP has defended Labour leader Jeremy Corbyn after he did not sing the national anthem at a Battle of Britain ceremony.Read the full story ›
Sedgefield MP Phil Wilson has said the Labour Party must 'respect' the decision to elect Jeremy Corbyn as its new leader.
Mr Wilson explained his thoughts about his party's new leader to our Political Correspondent Paul Brand.
Middlesbrough MP Andy McDonald has congratulated Jeremy Corbyn after he was elected as the new Labour Party leader.
In a statement, Mr McDonald said:
First, let me congratulate and welcome Jeremy Corbyn and Tom Watson as the new Leader and Deputy Leader of our great party
I had the pleasure to welcome Jeremy and Tom to Middlesbrough during the leadership campaign. On both occasions large audiences listened to and came to know our new leadership and now back them as they have done across the country.
They have both put themselves forward, made their case compellingly and we must now resolve to put our Party first and make sure that the next Prime Minister is a Labour Prime Minister.
More than 1500 Jeremy Corbyn supporters attended a rally on Tyneside for the Labour leadership candidate. Were you one of them?Read the full story ›
Nowhere does this race matter more than here. The North East is more loyal to Labour than any other region.Read the full story ›
The candidates fighting to become the next Labour Leader have been trying win support in the North East today, July 12.
The four remaining candidates, and those running to be their Deputy, took part in a hustings.
Find out what Andy Burnham, Liz Kendall, Yvette Cooper and Jeremy Corbyn believe they could bring to our region in Claire Montgomery's report:
Newcastle is hosting one of eleven hustings that are taking place across the country in the run up to voting for the next Leader and Deputy Leader of the Labour Party.
Later today, July 12, all candidates will speak at The Great North Museum in a hustings moderated by the Northern Echo's Political Editor, Chris Lloyd.
- Liz Kendall
- Andy Burnham
- Yvette Cooper
- Jeremy Corbyn