David Cameron has left open the possibility of a coalition with Nick Clegg's Liberal Democrats by refusing to rule out discussions on reform of Britain's first-past-the-post voting system.
The Tory leader's reluctance to close off the possibility, during an exclusive interview with the Observer, comes amid signs that the Lib Dems are holding on to increased support after two televised leaders' debates – and could deprive the Tories of an outright majority.
Cameron insists that he still believes the first-past-the post system is the best for Britain. "I want us to keep the current system that enables you to throw a government out of office. That is my view," he says.
But when pressed on whether, in the event of a hung parliament, he would be prepared to discuss the Lib Dems' central demand for electoral reform – something he has always opposed until now – he declines to rule it out. When it was put to him that refusal to move on the issue could mean the Lib Dems teaming up with Labour to push through electoral reform anyway, the Tory leader says: "We think this is an important issue."
Cameron's comments suggest the Tories may now be prepared to put reform of the voting system on the table in coalition talks, rather than allow the issue to be a "deal breaker". After being asked four times to rule out such discussions on electoral reform, Cameron said: "Put the question in, you know, Serbo-Croat, if you want to – but you're going to get the same answer." Labour has promised a referendum on the alternative vote system.