UBS trader Kweku Adoboli leaves City of London magistrates' court in London
UBS trader Kweku Adoboli leaves City of London magistrates' court in the City of London October 20, 2011. REUTERS

(REUTERS) -- The former UBS trader accused of unauthorized deals that cost the Swiss bank $2.3 billion pleaded not guilty to all four charges of fraud and false accounting in a London court on Monday.

Kweku Adoboli, 31, was charged in September in connection with one of the world's biggest cases of alleged rogue trading.

(Peter Griffiths)

Court London London