Spain’s Socialists increased their lead in a poll published in newspaper ABC that gave them 31.5% of votes, but fell short of a majority ahead of a general election on April 28.

It is the third poll in two days that shows the Socialists expanding their advantage, and forecasting that a coalition of three right-wing parties - People’s Party (PP), Ciudadanos and far-right Vox - would not get enough seats to form a parliamentary majority.

Socialist Pedro Sanchez could be reelected as prime minister if he forms a coalition with the support of at least two of the array of parties - far-left Podemos and a Catalan pro-independence group -  according to the ABC poll. But it also showed that 33% of voters have not decided who they will vote for next Sunday.