they could do it with a supply and demand deal( they back Labour on major issues,) without a fomal coalition, to be honest, i wouldnt believe anything at the moment till the votes come in, if power is on offer watch these red lines get binned.
Labour could sit back let the tory /libs in knowing they could out vote them with the snp ect and force another election its all up in the air, i dont think the snp will get the number of seats they think there going to get as a lot will say they are voting for them in public, but do something diffrent when it comes to voting on a slip, as they did the last time out.