John Di Bacco, the US-based banker who supervised UBS’s London exchange-traded funds team from April 2011, today spoke about his anger upon being told by Kweku Adoboli that he had "forgotten" to book a futures trade in August last year.

Di Bacco, giving evidence at London's Southwark Crown Court in the fraud trial brought against Adoboli by the Crown Prosecution Service, recalled how an employee at the bank, Will Green, told him in August 2011 that the bank had futures that were not booked, and said the trade had originated on the London ETF desk.