A consumer rights organization has warned that "shoulder surfing" thieves are pursuing smartphone users for their passcodes.

Before stealing people's mobile phones and withdrawing substantial quantities of money from their bank accounts

 thieves are aiming to take advantage of the fact that Britons enter their passcodes

.After visiting a popular London pub, Nick, 46, 

 from Somerset, was the victim of "shoulder surfing."

His bank accounts were raided for more than £70,000, 

£15,000 seized from his personal account and £58,000 taken from a business fund.