The demolition of the world's first civil nuclear power station got under way at the Sellafield plant in Britain this morning.

Four cooling towers at Calder Hall in Sellafield, Cumbria, fell to the ground after 47 years of generating electricity.

Today's operation is the first step towards decommissioning the site, which comprises 62 buildings.

A spokesman for British Nuclear Fuels has said a risk assessment had been carried out and it is believed all physical effects of the blast will be confined to within 200 metres of the demolition site.