Leanne Wood , the leader of Plaid Cymru , said she would refuse to be part of a formal coalition with a Labour Party committed to implementing austerity and replacing Trident . The leader of the Welsh nationalists has vowed never to help prop up the Conservatives in the event of a hung parliament - but could work with the SNP to drag a Labour government to the left . Leanne Wood , the leader of Plaid Cymru , said she would refuse to be part of a formal coalition with a Labour Party committed to implementing austerity and replacing Trident . But she said the election was 'an unprecedented opportunity ' to force the next Government to give Wales as much public spending per head of population as Scotland . The intervention echoes demands made by Alex Salmond ’ s SNP that the Scottish nationalists will not support Ed Miliband as Prime Minister unless he agrees to ‘ end austerity ’ . Although Miss Wood is largely unknown outside of Wales , this is set to change on Thursday night when she takes part in an unprecedented seven-way leaders debate . Launching her party ’ s manifesto in Bangor , she said the election offers voters in Wales an ‘ unprecedented ’ opportunity to influence the direction of government policy if Plaid Cymru holds the balance of power . Miss Wood said Plaid was aiming to use any influence it gains to rebalance power and wealth away from the City of London and towards Welsh communities . ‘ This election provides Wales with an unprecedented opportunity , ’ she told supporters . ‘ There will in all likelihood be another hung parliament after May and the direction of the next government could come down to how strong a presence of Plaid Cymru MPs there are in parliament . ‘ If Plaid Cymru holds the balance of power , we will use that to rebalance power and wealth throughout the UK , away from the financial sector in the City of London and to those communities in Wales that need the investment. ’ Asked earlier about her party 's positioning in the event of a hung parliament , Ms Wood told the BBC Radio 4 Today programme that it would work with the Greens and the Scottish National Party if it was ‘ in our interests ’ . She said : ‘ We 've said we 'll work and co-operate with the Greens in England and the SNP if the numbers – of course we 've got to have an election and it 's a matter for the people to decide - but depending on the numbers , if it 's in our interests to work with those other parties to secure the very best deal for Wales , then we will . It may be that it 's in our interests to work separately. ’ She added : ‘ There 's no way that we could support the Tories in government , absolutely not . Wales has never given a mandate for the Tories to rule over us and it 's highly unlikely that they will next time. ’ Miss Wood ( left ) , Scottish First Minister Nicola Sturgeon and the Green Party leader Natalie Bennett ( right ) could unite after the election to keep David Cameron out of Downing Street . Plaid Cymru , she said , had ‘ no appetite ’ to see Tory policies implemented by Labour , adding : ‘ So while we wo n't prop up a Tory government , we wo n't back a Labour government to implement austerity and Trident replacement either . ‘ We would not be part of a formal coalition with a Labour government prepared to renew Trident . There is no way that Plaid Cymru MPs will ever vote to support the replacement of a system which would cost £100 billion and which no government would ever realistically use. ’ She said Plaid Cymru has a ‘ very close ’ relationship with the SNP , is in regular contact and has a lot of common ground . She added : ‘ It makes sense for both our parties to continue working together. ’ Miss Wood added : ‘ We want to end austerity , we want to bring an end to this Conservative Government and we want a better funding deal for Wales. ’ Party leaders , she added , ‘ see no reason ’ why Wales should not be treated equally with Scotland and Plaid is the only party in Wales seeking to achieve parity with Scotland . She said Wales ‘ risks being overlooked again ’ unless there is a strong team of Plaid Cymru MPs whose chief priority would be Wales and securing the best deal on powers and resources .
Plaid leader WoodLeanne Wood said she would refuse a formal coalition . But she said Plaid could join with SNP and Greens to pull Labour left . Miss Leanne Wood said the election was an 'unprecedented opportunity ' for Plaid . She will use 'balance of power ' to force through more spending for Wales .