On Saturday, three-quarters of a million people staged the biggest protest yet in the fightback against the Tory-led coalition's brutal cuts programme writes campaigns reporter John Millington in the Morning Star.
Some estimates put the number on the TUC-organised March for the Alternative as high as 800,000 - ordinary women, men and children from across Britain determined to add their voice to the resistance.
The demonstration brought together a broad cross-section of Britain's working class from the public and private sectors, young and old, black and white.
Its huge scale sent a warning to Prime Minister David Cameron that the trade union movement will not stand idly by while millions are made unemployed and public services are decimated.
Setting off from Embankment workers from every walk of life donned union colours, waved flags and passionately chanted as they moved slowly towards a rally in Hyde Park.
People were still arriving in the park after the speakers had finished five hours after the head of the march had set off at 12pm.
Unite general secretary Len McCluskey, addressing the hundreds of thousands who did make it to Hyde Park by the start of speeches at 2pm, pointed out to huge cheers that the tail end was still at Waterloo Bridge four miles away.
Mr McCluskey drew repeated roars of approval from the crowd after declaring of the Tories: "Unless they stop their cuts and drop the NHS Bill, this will be their poll tax."
Tens of thousands of first-time marchers turned out to march through London.
Maritime worker Martin Ingham had travelled from Liverpool to take part in his first march.
Speaking to the Morning Star he said: "I'm worried about cuts to the Maritime Coastguard Agency, the merchant navy and to the tug fleet."
Mr Ingham added that the cuts were an attack on the poor and that's what made him determined to attend his first protest march.
Selina Clark from Withernsea just outside Hull had left home at 4am to make the demonstration.
She said that she was marching for the first time because she "didn't want to lose her job" at a primary school.
"Unemployment is getting worse and we are starting to see the consequences," Ms Clark said.
Although the TUC-organised demonstration was trouble-free there were some small scuffles.
And many people were annoyed when the police closed Embankment station before the march began because of the sheer scale of the demonstration, adding an extra mile for would-be marchers.

Communist Party trade union organiser Anita Halpin has made the following statement in response to the TUC demonstration on March 26: 
 
'However much the police and capitalist media underestimate the size of Saturday's demonstration, in Cairo or Tripoli it would have been hailed as mass support for regime change.
  The message in London was loud and clear: everyone threatened by cuts in public services, jobs, wages and pensions is in it together - against a Cabinet of multimillionaires.
  The TUC should now have the confidence as well as the mandate to lead a coordinated fight-back to challenge the Con-Dem government's austerity budget which will hit local communities across Britain in coming weeks'.