Deep down the streets of London there is a secret underground vault where 4,600 tons of gold of the Bank of England is stored.All this £197 billion worth of gold bullion is carefully guarded and rarely seen by outsiders.
Each shelf in the warehouse holds £35 million worth of gold.
Chemistry professor Martyn Poliakoff of the University of Nottingham has just been allowed to visit the British treasure.
Even when sold, the gold in this vault is not taken out, but simply converted to the owner’s name.
If you consider all this gold as a brick, using them can build a wall 20m high, or a square wall measuring 18mx18m.
