On 28 June 2012, former Barclays trader Daniel James Plunkett exploited the weaknesses in Barclays’ systems and controls to seek to influence that day’s 3:00 p.m. Gold Fixing and thereby profited at a customer’s expense. . .

http://www.fca.org.uk/news/barclays-fined-26m-for-failings-surrounding-the-london-gold-fixing