It was while G E A Kentfield was Chief Cashier that the Bank of England had to modify the design of it's banknotes.
The original design included a little crown in the top right hand corner of the front of all denominations. Unfortunately, this feature confused the public so much that the bank was forced to remove the crown on values above £10, replacing it with the denomination.
These Crisp Uncirculated 'Enhanced' £10 notes first appeared in November 1993. The front features the portrait of Queen Elizabeth II with Charles Dickens and a scene from Pickwick Papers on the back.