Kweku Adoboli, the former UBS trader standing trial over a $2.3bn trading loss, has told a court that the version of events he gave to representatives of the Swiss bank last September was “aimed at protecting other staff” from blame.Adoboli has been standing trial at Southwark Crown Court in London since September. He is charged with two counts of fraud and four counts of false accounting, in connection with a $2.3bn loss incurred by the bank last year allegedly as a result of his unauthorised trading. Adoboli denies all of the charges.Sasha Wass QC, for the prosecution, yesterday continued her cross-examination of Adoboli, who was giving evidence in the case for a seventh day.Wass asked Adoboli about an email he sent to William Steward, a back-office accountant at UBS, in which he purportedly revealed the extent of his trading activity on September 14 last year, stating in the email he “took full responsibility for my actions”.At the outset of the trial in September, Wass alleged that Adoboli had explained at a meeting with UBS representatives on the evening of September 14, 2011, that his activities had not been discovered and “neither did others on his desk know anything about it”.During the trial proceedings since then, however, Adoboli has repeatedly claimed that former colleagues at the bank – including those on UBS’ ETF desk – none of whom still work for the bank – knew about his trading activity.Asked by Wass if his September 14 email differed from the account given during the course of his evidence, Adoboli said: "Yes, but that was before the prosecution opened your case calling me a gambler."He told the court yesterday: “The words in this email were used purposefully so that the responsibility would land on my shoulders.”He said: “The things I said were to make sure no one else was held accountable.”Wass then read out a string of excerpts from the "attendance note" record made of his meeting on September 14 last year with UBS representatives in the presence of lawyers, asking each time whether Adoboli had said the things asserted, and if those things had been true. On several occasions, he told the court yesterday that he had said the things, but that they had been untrue.Asked by Wass why he had changed his stance since then, the former ETF trader told the court: “I knew there would be an investigation, but I certainly did not think I would be arrested. That is why I have to stand up and tell the full story now.”Wass ended her cross-examination of Adoboli yesterday afternoon, before defence barrister Paul Garlick QC started his re-examination of the former trader.The case continues.