Banks that allowed two Nigerian politicians to open accounts should have known better, according to Charles Intriago, founder of the International Association for Asset Recovery, a group devoted to recovering illicit assets...An HSBC spokesman called the report’s allegations “misguided,” adding that “rigorous and robust compliance procedures were followed diligently.”...UBS said it “will study the [Global Witness] report to identify areas where further improvements in dealing with PEPs may be possible” in an emailed statement. The bank said it introduced enhanced anti-money laundering policies in 2009. Barclays and RBS declined to comment.