More than 80,000 people took to the streets of Manchester on Sunday to protest against the government's austerity measures.
Union leaders and campaign groups led the mass demonstration as the Conservative party conference began in the city.
Is @unisonscot @GeorgeMcIrvine sending secret overtures to David Cameron? #no2austerity #yestoworkersrights
The march is part of the People's Assembly Week of Action against spending cuts.
The TUC also joined the march to protest against the Trade Union Bill which would make it harder for workers to strike.
More pig jokes #No2Austerity
TUC general secretary Frances O'Grady criticised the bill, saying that "trade unions are facing one of the most challenging times in our history. The Trade Union Bill is a fundamental attack on the right to strike."
She added: "It is, in the words of Liberty and Amnesty International, a major assault on civil liberties in the UK."
Following recent allegations that David Cameron "put a private part of his anatomy" into a pig, many of the protest signs were decidedly porcine.
Pig 17 at #No2Austerity is punderful!
Many wore pig masks on the march.
Pig masks are out in force in Manchester today. #porkcameron
Earlier on Sunday, David Cameron told Andrew Marr that he would not dignify the pig allegations, made by Lord Ashcroft in a new book about the prime minister, with a response.
Lots of people in pig related gear on this march, not sure why......'welcome' the Tories to Manchester!
Anti-Tory sentiment was strong on the march, and some journalists were advised to remove their Conservative party conference badges.
I'm in manchester, hmu for drinks, pig sex etc
There were reports that one Tory member was egged outside the conference.
A new contender for the top spot at #No2Austerity
As the march reached its end point on Liverpool Road, crowds prepared to listen to speakers, including Labour leader Jeremy Corbyn and journalist Owen Jones, at Castlefield Arena.
"Cameron Osborne on your bike / what we need is a general strike."
In a speech, NASUWT leader Chris Keates said: ""We're standing up for rights of working people to be treated with respect and dignity."
Pigs against #Tories Don't let Cameron do to unions, workers +poor what he did to a pig! #toryconference #Manchester