DUBAI (Reuters) – Britain’s Financial Conduct Authority (FCA) said on Tuesday it had warned Luxembourg-based Banque Havilland over a 2017 presentation by the bank that the regulator said included advice on “manipulative” practices in trading Qatari bonds. FCA said in a notice that its warning, issued in October 2021, stated the bank had breached the body’s principles for businesses by creating and disseminating the document. There is usually a lag in publishing details of the FCA’s enforcement cases to allow those involved to contest any allegations. The presentation “set out a number of steps…