<text>  Green Party leader Natalie Bennett today threatened to bring about a peaceful political revolution as she pledged to unite with the Scottish and Welsh nationalists to block government spending cuts. Miss Bennett said the election could be a turning point in history after it was revealed the party has held talks with the SNP and Plaid Cymru about forming a left-wing progressive alliance in Parliament. At the start of the partys biggest ever conference yesterday, Miss Bennett pledged to introduce free social care for all over-65s and said the country needs a range of new taxes. Scroll down for video . Green Party leader Natalie Bennett threatened to bring about a peaceful political revolution in UK politics . As she arrived for the speech in Liverpool, Miss Bennett had been ambushed by journalists and asked: Have you got your brain in gear today? The party has experienced a so-called Green surge with record support and a quadrupling of membership in a year, but Australian-born Miss Bennett has faced sniping from within her own party. After an excruciating radio interview last month, which saw her lapse into long silences, have coughing fits and complain of a huge cold, she apologised to members for her performance. MP for Brighton Pavillion, Caroline Lucas embraced the party leader Natalie Bennett on stage at the Green Party Spring Conference in Liverpool this afternoon . Green Party delegates listen and applaud as Green Party leader Natalie Bennett delivers her keynote speech . A CND Campaign for Nuclear Disarmament activist wears a woolly hat its campaign logo while attending the opening day of the Green partys pre-election conference . Leaflets in support of the Green Partys only MP, Caroline Lucas, sit on a table on the opening day of the partys conference . This afternoon, Miss Bennett told members in in just nine weeks time, you will have in your hands something miraculous ... the possibility of a peaceful political revolution. Your vote can change the face of Britain. It can end the failed austerity experiment, end the spiteful blaming of the poor, the sick, the vulnerable for the mistakes of the wealthy. This election can be a turning point in history. Miss Bennett announced that free social care for over-65s would be a pledge in the partys manifesto, due to be released at the end of the month, because she said it was vital in a decent, humane society. She did not explain how this would be funded, but said those who have the most should contribute and said the party would introduce a new wealth tax, a financial transaction tax and higher income tax for those earning more than 100,000. Caroline Lucas, the partys former leader and only MP, said there had been talks with the SNP and Plaid Cymru about acting as a left-wing bloc of MPs at Westminster in the event of a Labour government. With the rise of the SNP, and with our own Green surge, we have the chance to forge a new grouping in Parliament. A progressive alliance, she said. She added that the parties were united in their opposition to austerity and cuts to essential services and would work to block the Labour party when they ape the Tories. Parliamentary Candidate for St Helens and Whiston, James Chan left, was in the hall alongside hundreds of Green Party activists this afternoon . Green Party candidate for Liverpool Riverside, Martin Dobson on stage at the partys Spring Conference . Caroline Lucas, the partys former leader and only MP, said there had been talks with the SNP and Plaid Cymru about acting as a left-wing bloc of MPs at Westminster in the event of a Labour government . Over 1,300 Green Party members are expected to attend the three-day conference this weekend. They will debate matters including a motion to remove our policy to ban all cars. A poll conducted by ComRes for ITV News yesterday revealed that the party is most likely to be associated by the British public as idealistic 41 per cent and amateurish 35 per cent. But it also found voters are more likely to associate the Greens with the phrases A party of the future 21 per cent or appealing 18 per cent than they would associate with the Liberal Democrats 9 per cent and 11 per cent respectively. 