A Bradford bank worker who fleeced some of Britain’s wealthiest people in a £1 million sting has been told he is facing jail.

Customer co-ordinator Chikezie Emeruem, 33, who worked at the Manningham Barclays branch, was part of a con that swindled customers at the bank’s Sloane Square branch in London’s upmarket Belgravia.

Emeruem and cashier Mohammed Iqbal, 30, used their security clearance to access the bank’s database and set up cash transfers.

Businessman Naresh Patwari, 50, then used his company accounts to launder or wire the cash abroad.

More than £348,000 was siphoned from the accounts of customers during the scam and unsuccessful attempts were made to transfer another £633,000. But the crooks were exposed by electronic records which showed them repeatedly accessing the victims’ accounts.

The three gang members now face jail after a jury at Southwark Crown Court today convicted them of theft, fraud and conspiracy charges.

The jury is still deliberating in the case of two more alleged gang members, 24-year-old cashier Tommy Jackman and businessman Karl Hession, 29, who is accused of helping the fraudsters launder the money.

Prosecutor James Dawes told the court the fraudsters paid forgers to produce fake identity documents in the names of rich Barclays customers who banked at Sloane Square.

He said the insiders - Iqbal, Jackman and Emeruem - would initially look into accounts to see if it was worth stealing from it.

On August 3, 2007, a customer’s account was illegally accessed at a Barclays branch in Manningham, two days after Iqbal had processed a transaction for them in Sloane Square.

Records showed that on that day, the cashier had accessed the account six times during the afternoon – long after the customer had left the bank. Two days later, someone pretending to be the customer went into the Manningham branch and made a fraudulent CHAPS transfer to a company called Brats Ltd.

Shortly after that, electronic records showed Iqbal looking at the Brats account. Patwari would then wire the stolen cash overseas via his construction firm Swift GB Ltd.

The other defendants also denied any involvement in the scam.

Emeruem, of Church House, Adel, Leeds, was found guilty of theft, two counts of attempted theft and fraud by abuse of position.

Iqbal, of Stanmore, Middlesex, was convicted of two counts of theft, two counts of attempted theft, conspiracy to steal and fraud by abuse of position.

Jackman, of Enfield, Middlesex, was convicted of fraud by abuse of position, after prosecutors found bank details from a customer at Abbey National, where he used to work, at his home address.

The jury is still undecided on further charges against him of attempted theft, conspiracy to steal, and fraud by abuse of position in relation to the Barclays fraud.

Patwari, of New Malden, Surrey, was unanimously convicted of acquiring criminal property.

Hession, of Stoke-on-Trent, denies a similar charge.