This was the scene in Doncaster town centre this afternoon, when crowds gathered to hear Ed Miliband and Jeremy Corbyn speak on the EU referendum in the first time the former and current Labour leaders have shared a platform.
Speaking first, Mr Miliband laid out his argument for remaining in the European Union, ahead of the referendum on June 23.
He said: "This referendum has looked too much like an argument between David Cameron and Boris Johnson.
"This is not an argument about the Tory party, this is an argument about your future, your kids future and your grandkids future.
"And so we want to say very clearly today: to the nine million people who voted Labour in the last general election, to all those people that support Labour - that Labour supports staying in the European Union. And we support staying in the European Union for a very simple reason: we want a Labour government as soon as possible.
"But that Labour government will find it much easier to change this country and make it a fairer country if we're inside - not outside - the EU."
Following his visit to a biomass plant in Lincolnshire this morning, Mr Corbyn told the Doncaster residents watching the rally that he believed Britain should remain in the European Union because 'you can't protect the environment just within national borders'.
He said: Pollution flows from one country to the other, air pollution flows from one country to the other, you have to work with other countries in order to bring about a cleaner, sustainable future all across this continent. That's one good reason why we should remain, and work with people who think like us all across Europe to protect those conditions.
"Another reason is working conditions, I used to be a full time trade union organiser, and we argued very long and hard for minimum wage and conditions. We argued very long and hard for longer holidays, we argued very long and hard for paternity leave and an end to discrimination, against women losing their jobs due to pregnancy. We won some we lost some. Trade union action across Europe brought about four weeks holiday for everyone across the continent. Trade union action brought about protection for jobs when a country changes hand.
"Those arguing for a 'no' vote on June 23rd, you know what the first thing they say is? On the 24th there'll be a bonfire of regulations. Regulations never sound nice but if those regulations guarantee you holidays, guarantee security of employment, guarantee you [protection] from discrimination, guarantee you clean air, clean beaches for a sustainable environment then they're regulations worth having."
Doncaster Central MP, Rosie Winterton and Don Valley MP, Caroline Flint joined Mr Miliband and Mr Corbyn on the platform, along with MEP for Yorkshire and the Humber, Linda McAvan.