Labour MPs are said to be hatching a secret plot to stop the party brokering a coalition with Nicola Sturgeon 's SNP . Labour MPs are hatching secret plans to wreck any deal with the Scottish Nationalists by holding an emergency summit after the Election . A meeting of the entire Parliamentary Labour Party ( PLP ) would be convened in order to veto any attempt by Mr Miliband to win Downing Street by brokering a deal with Nicola Sturgeon ’ s SNP . Labour MPs say the possibility of forming an alliance with a party which wants to break up the UK is already alienating many of their core voters on both sides of the border . John Cryer , chairman of the PLP , is understood to have told Mr Miliband ’ s aides that his MPs will not tolerate a repeat of the situation after the 2010 election , when Gordon Brown tried to stay in power by striking a deal with Nick Clegg , but without consulting his party . Mr Miliband publicly insists his only concern is to achieve an outright Labour majority . But plans are being made by senior Labour MPs , subject to security arrangements , for the PLP to meet inside the Commons on Sunday , May 10 – three days after the Election – if there is a hung Parliament . A weekend meeting is highly unusual , but it would be the only chance for MPs to gather after all of the constituencies have declared , but before the start of negotiations to form a new Government . As the polls stand , Labour will not win enough seats to form an administration , and its only option might be to try to stitch together a three-way ‘ grand coalition ’ with the nationalists and Lib Dems . The SNP – which currently has just six Westminster seats out of a total of 59 in Scotland – is on course to win as many as 56 , mainly at Labour ’ s expense . Although Mr Miliband insisted on Friday that talk of an agreement with the SNP was ‘ a piece of nonsense ’ , he has stopped short of ruling it out . Last night , Labour MP Graham Stringer demanded that the leader listen to his party . ‘ I do not think there is any way that the PLP would support a pact with the SNP because it would do such long-term damage to the party ’ s electability , ’ he said . ‘ We need to slam the door on a deal with the nationalists . It is not just harming our vote in Scotland – the prospect of an alliance with a party which wants to break up the UK is also hitting our prospects south of the border. ’ Ed Miliband insisted that talk of an agreement with the SNP was 'nonsense ' but stopped short of ruling it out . Labour ’ s former Home Secretary , Alan Johnson , said on Thursday he did not know why his party had not ruled out a pact , adding that it ‘ couldn ’ t possibly do a deal with a party that wants to be out of the United Kingdom and give up our nuclear deterrent ’ . Labour nerves have been rattled by the successful launch of a new Tory campaign poster , which shows a miniature Ed Miliband in the top pocket of former SNP leader Alex Salmond , who is expected to win a Westminster seat . One Labour MP told The Mail on Sunday : ‘ We will not tolerate coalition negotiations taking place above [ our ] heads again , and certainly not if it means getting into bed with the SNP ... This has been accepted in principle by Miliband ’ s office. ’ A Labour Party spokesman said : ‘ Our focus is on one thing and one thing only : a majority . We don ’ t need , don ’ t want and are not planning for a coalition. ’ Mr Cryer was not available for comment .
Labour MPs are expected to wreck an deal with the SNP after the election . A majority of parliamentary party leaders be convened to veto any coalition . Members ' lack of alliance with nationalists would hurt voters . Labour leader Ed Miliband insists only concern is to win outright majority .