The lives of up to one million children could be saved every year if two new vaccines were made widely available in the developing world, a charity has said as it launched its biggest ever campaign.

Pneumonia and diarrhoea kill almost three million under fives every year, the equivalent of about 8,000 children a day.

But Save the Children says routine vaccinations could cut the death toll by more than a quarter.

The aid agency is launching its No Child Born to Die campaign backed by celebrities including singer Alexandra Burke, England footballer Frank Lampard, actor Martin Clunes, actress Helena Bonham Carter and presenter Edith Bowman.

The campaign aims to save three million lives over three years, train 50,000 health workers and provide safe births for 640,000 babies and their mothers.

Save the Children is also warning that the delivery of vaccines to combat the two biggest child killers, pneumonia and diarrhoea, is facing a funding crisis.