Marijn van de Geer, of XR, told a press conference: “From today, we are putting the Government on notice.
Extinction Rebellion Protest: Lloyd’s of London
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“They have seven days to agree to enter negotiations around these two demands or we will step up our campaigns in new and inventive ways, working towards a coalition unprecedented in size.”
She said the Government has until 5pm on Monday April 24 “to agree to enter negotiations about the two collective demands that we have presented to them today”.
Ms van de Geer added: “If we don’t get a response, at 10am on Tuesday April 25 Extinction Rebellion will build an unprecedented coalition, stepping up our campaigns in the weeks and months ahead along three pathways - that is to picket to stand in solidarity with the strikers, to organise locally and to disobey.”
More than 200 organisations are supporting the “The Big One” action, including Greenpeace, Friends of the Earth and PCS Union, XR said.
Ms van de Geer said: “We’ve come back stronger than ever, with unions, NGOs, ethical companies and a whole host of environmental groups all united in our call for political change and action to protect all life on Earth.”
She said “The Big One” will “be a period of connecting and music and dance but also it is a four-day coming together of over 200 groups with memberships totalling millions of people in this country and globally to decide what more radical action would look like for them”.
She added: “So across these four days everyone will deliberate on what comes next if the Government refuses this major opportunity to engage with our demands, because we all agree the clock is ticking for every human and non-human alive today and none of us should and will sit quietly while time runs out.”
More than 28,000 people have signed up to attend during the four-days of protest but XR believes the turnout may be higher, Ms van de Geer said.
Ms van de Geer added: “Of course, having 30,000 people in the Westminster area may cause some logistical disruption, and there is of course also the London Marathon happening as well, so it is going to be nice and busy in central London over the weekend.”
A Met Police statement said: “The Met is aware of planned protests by Extinction Rebellion this weekend.
“We are in contact with the organisers in the run up to their event, and will continue to engage with them throughout the period, in an effort to avoid serious disruption and delays to London’s communities and the other events taking place in London. However, we have a policing plan in place to provide an appropriate response to the protest.
“People can expect a visible, engaging but firm policing presence to tackle any criminal or anti-social behaviour and disorder. Alongside a significant policing response we will be using specialist officers to respond to any protesters who lock or glue themselves to street furniture or purpose built structures.”