Britain's leader warns that "red warning lights" are flashing on global economy's dashboard

Britain's Prime Minister David Cameron has offered a bleak assessment of global economic prospects, comparing potential troubles to red warning lights on a car's dashboard.

Writing in an op-ed piece in the Guardian newspaper after returning from the G-20 summit in Australia, Cameron said Monday that a lack of growth in Europe and conflicts in the Middle East and Ukraine add to the backdrop of instability.

Cameron also suggested that austerity measures might not be loosened despite Britain's growing economy. The remarks come only weeks before his Autumn Statement on government spending.

"As the global economy faces greater uncertainty, it is more important than ever that we send a clear message to the world that Britain is not going to waver on dealing with its debts," Cameron said.