And in a pledge that will be attacked by Tory ministers, the manifesto says the Labour leader will only send the armed forces into combat if "all other options have been exhausted".
Mr Corbyn was arriving for a meeting to agree the party's General Election manifesto after the entire draft document was leaked to the media.
BBC cameraman Giles Wooltorton is loaded into an ambulance after the auto carrying Jeremy Corbyn ran over his foot.
It is believed that only Labour's most senior figures had access to the 43-page draft of the party's manifesto.
A leaked draft version of the document, which includes plans to nationalise key industries and reverse years of austerity, has been denounced by the Conservatives as a recipe for taxes and borrowing that would leave the United Kingdom on the "road to ruin".More news: Trump's plan to cut corporate tax would be profit tailwind
"The best champions, the best advocates of manufacturing and the vehicle industry are the three people standing in front of you who will stand up and fight for the auto industry and manufacturing in the House of Commons, " said Brown, who led Labour and the country from 2007 to 2010.
"We will measure our economic success not by the presence of millionaires, but by the ability of people to make ends meet" - from the leaked draft Labour manifesto.
While the New Statesman asked if the leadership stood anything to gain from a leak: "Just because they're out to get you, doesn't mean that you didn't on this occasion leak it to secure a bigger splash than it would otherwise have got".
The auto belonged to the Metropolitan Police, which will conduct its own investigation into the incident.
'Or is it safe with the people who have always fought for the health service, that supported the extra funding, that made the promises and want to see them kept, that will hold the Government to account on the National Health Service.More news: France claims Syria used chemical weapons
But Labour's joint election co-ordinator Andrew Gwynne played down the significance of the leak, which he said had put the party's "transformational" policies at the top of the news agenda.
The official manifesto is due to be launched next week. "We will announce our policies in our manifesto, which is our plan to transform Britain for the many not the few".
More than 80 people were entitled to attend today's Clause 5 manifesto meeting to finalise the Labour manifesto.
"He has been taken to hospital for assessment and treatment", the BBC said in a statement.
And he added: "She is using exactly the same words and phrases that I've been using for 20 years", he said.More news: The biggest announcements from Microsoft's Build event
"On the plus side, we are all talking about the Labour party this morning and visions of how this country can be better".
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