Thousands of people from across the UK are expected to march to Parliament on Saturday in a national rally against the Conservative Government.
Labour figures including John McDonnell and Diane Abbott as well as Unite union boss Len McCluskey and writer Owen Jones are among those planning to speak to crowds at the "Tories Out" demonstration.
More than 8,000 people have said they will be attending the protest, marching from BBC Broadcasting House in Portland Place to Parliament Square from around midday.
Musicians including DJ Shy FX, north London rock band Wolf Alice and singer Get Cape. Wear Cape. Fly are also set to be appearing.
Organisers said they “need to make sure” the opposition to Theresa May’s Government is felt.
Saturday’s planned march follows similar protests in Westminster on June 10 and 17 in the wake of Theresa May’s disastrous General Election result which left her forced to agree a deal with the DUP for Parliamentary support.
Protesters swarmed to central London chanting “May must go” and pro-Jeremy Corbyn slogans while holding placards emblazoned with messages including “cuts cost lives” and “no Tory-DUP Government”.
This weekend’s rally – called Not One Day More #ToriesOut – has been organised by anti-austerity campaign group The People’s Assembly.
Organisers said online: “If we continue to mobilise in huge numbers we can deepen the crisis for the Conservatives and force big concessions on the NHS, education, housing and jobs.
“On Saturday 1 July we invite everyone - from campaigns and community groups across the country, from the trade unions, from political parties, and any individual - to come together in one massive show of strength and solidarity.
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“We're marching against a Government committed to austerity, cuts and privatisation. We're marching for a decent health service, education system, housing, jobs and living standards for all.”
Protest outside Downing Street against DUP alliance
On the event page on Facebook, 21,000 people have so far registered their interest in attending the march.
People from across the country are being bussed for the march. Coaches are being put on for people from all over the UK including Glasgow, Cardiff, Exeter, Manchester and Newcastle.
A minute’s silence will be held for the Grenfell Tower victims and also a minute’s applause for the emergency services.
Also due to speak is London Assembly member for the Green Party, Sian Berry as well as representatives from the Fire Brigades Union, Momentum, Stop the War coalition and the GMB.
The People’s Assembly calls itself a broad nationwide campaign against cuts and privatisation and claims it is linked to no particular party but instead aims for joint action.
On Monday, Theresa May and DUP leader Arlene Foster announced they had agreed a confidence and supply deal.
