DAVID CAMERON claimed yesterday that the “collapse” of Scottish Labour means that the Tories are “now the only party that can challenge the SNP” at May’s Holyrood elections.

Speaking at the Scottish Conservative Party conference in Edinburgh, the Prime Minister said his party is the “only party fit to expose these spendthrift, out-of-touch, dogmatic, inept nationalists,” pledging: “Over the next 62 days we will fight to become the official opposition.”

His comments come as opinion polls suggest the SNP is on track to widen its majority this May while the Tories are gaining ground on Labour.