Police say the net is closing in on the gang behind what is thought to be Britain’s biggest ever robbery. It follows the discovery of a number of items believed to have been used in the raid in which up to 50 million pounds – the equivalent of 73 million euros – were stolen from a security depot in Kent in southeastern England.Guns, body armour and cash were found inside a white van. Steel cages, which detectives think were used to move the stolen money, were discovered in a field. Six armed robbers, posing as police officers, kidnapped the depot manager, his wife and young son to carry out the raid. Two men are currently being questioned by police.