The London Mayor said it would be 'fatal ' for the Tories to give any suggestion of a fresh power-sharing deal . David Cameron should rule out coalition with any other party after the general election , according to Boris Johnson . The London Mayor suggests it would be 'fatal ' for the Conservative Party to give any suggestion that it is in the market for a fresh power-sharing deal with the Liberal Democrats or another smaller party . 'We should say `` stuff coalition with anyone '' , ' Mr Johnson told the Daily Mail . 'We are there to win , we are there to offer leadership , we are there to be a Conservative government . 'If we go into this thing issuing faint pheremonal offerings or mating signals to this or that party , it would be absolutely fatal . ' Asked whether the Prime Minister should rule out a second coalition altogether , Mr Johnson replied : 'Yes . Otherwise people do n't know what they are voting for . ' Lord Steel says there is no appetite among Liberal Democrats for another coalition – or among the two big parties . ' A lot of David Cameron 's Tories want a Tory-only government , even if it 's a minority one , and similarly on the Labour side , ' the former Liberal leader told the BBC . ' I suspect – if you have to look into the crystal ball – that we 're going to get a minority government which will have a multitude of minorities in the parliament , which is something new , and they 'll be able to play one off against the other . ' He said the most that Lib Dems would countenance in another hung parliament would be a 'confidence and supply deal ' , where they agreed to support a larger party in key votes but did not enter a formal coalition or take ministerial jobs . He also said that his party needed to 'recharge its values ' . Mr Johnson , who is Mr Cameron 's chief leadership rival , criticised the fixed-term parliaments legislation introduced by the coalition – suggesting it should be repealed . 'The sooner it expires , the better . I always thought it was some bit of Lib Dem nonsense , ' he said . 'Constitutionally the thing we need to address is the rank injustice that it takes so many thousands more votes to elect a Conservative rather than Labour MP . It 's an absolute scandal . ' Former Conservative minister Sir Alan Duncan has led the calls for a cross-party deal to repeal fixed-term legislation , branding it a 'recipe for political horse-trading and coalition manoeuvrings ' . Labour 's Jack Straw and Tory Kenneth Clarke support the move . Critics say five years is too long , risking a 'zombie parliament ' in the final year . Few appreciated the long-term impact of the constitutional change , which was introduced to ensure one of the coalition parties could not walk out on the other and prompt an election . Boris Johnson - considered Mr Cameron 's main rival for the Tory leadership - said he should rule out any coalition deal after the election . It means prime ministers no longer have the power to go to the Queen to ask her to call an election when opinion polls are favourable . Instead , they need to win the support of a 'supermajority ' of two thirds of MPs for an election to be held at any time outside of a five-year fixed period . This means the leader of a minority administration would never be able to go to the polls without the backing of his or her opponents . The only other way to trigger an election as the law stands is if a government loses a vote on a formal motion of no-confidence . But other parties then have a two-week period during which they have the opportunity to stitch together a pact to govern before an election is held . A new coalition could therefore take power without an election . Critics say the legislation is a recipe for never-ending power-sharing .
Johnson should rule out a coalition and govern alone , David Cameron says . The London Mayor said it would be 'fatal ' to suggest it wanted a coalition . Mr David Cameron is considered Cameron 's chief Conservative leadership rival .