British scientists are secretly working on the design of a revamped nuclear warhead at the Atomic Weapons Establishment at Aldermaston in Berkshire.
The new warhead, due to be operational in five years' time, will be used to replace Trident missiles on submarines.
According to the report, Russia tops the table with 6,375 warheads, followed by the United States with 5,800, and the United Kingdom with 215 warheads.
Rediff.com present a comprehensive listing of the nuclear nations and their collective and active stockpile.
Pakistan military has appointed Lt Gen Zubair Mahmood Hayat as the new chief of the Strategic Plans Division, which manages and secures the country's nuclear arsenal.
Powering the Agni-1P will be the cutting-edge technologies developed for the Agni-4 and Agni-5 missiles.
