A primary school was evacuated earlier after builders suspected they found a World War Two bomb. 

Students and staff fled Ronald Ross Primary School in Castlecombe Drive after the discovery was made just before 11am. 

A Met Police spokesman said: "Police were called at 10.56am on Thursday March 2 to reports of a possible World War Two ordnance at a school playground in Castlecombe Drive, Wandsworth. 

"Cordons and road closures were put in place, and the school was evacuated as a precaution. 

"Specialist officers have now deemed the object safe - it was an electrical device, not an ordnance."

Police and London Fire Brigade attended. 

The device was later described as a "motorised propeller". 

Ronald Ross Primary opened again at 1pm.