SINGER Charlotte Church branded austerity "unethical, unfair and unnecessary" yesterday as she joined demonstrators marching in protest in London against Government cuts.

The demonstration - the biggest in Britain for several years - began in the heart of the financial district and snaked its way to Parliament. Organisers estimated 250,000 people had attended the march.

Church described the idea that Britain needs austerity as "the big lie".

She said: "What this country needs is economic stimulation - most economists around the world would say the same. We need to get the blood pumping."

She called for the country to rally and "save ourselves from decades of yuppie rule".

Comedian Russell Brand also addressed the crowds, saying: "Without a welfare state I wouldn't have been educated, without a welfare state I wouldn't have had anywhere to live, without a welfare state my mum would've died of cancer several times."

Organiser the People's Assembly Against Austerity had promised a festival atmosphere and the Metropolitan Police said no arrests were made.

A loud boo erupted through the crowd as it passed Downing Street and a red flare was set off, filling part of Whitehall with thick scarlet smoke.

An anti-austerity demonstration was also held in Liverpool yesterday. Sam Fairbairn, of the People's Assembly, said it was the beginning of a campaign of "protest, strikes, direct action and civil disobedience up and down the country".