Country is at risk of fresh turmoil with its government on the brink amid soaring sovereign borrowing costs

France is at risk of being plunged into fresh political turmoil as its minority government teeters on the brink of collapse amid opposition anger over a planned austerity budget.

Reflecting growing unease in financial markets, French sovereign borrowing costs have risen sharply, reaching the highest premium over German bonds since the height of the eurozone debt crisis in 2012.