Thanks jerry a. laska. In one of those threads you posted there is mention of CMB-MLE but I vaguely remember it is going to be seasonal and cannot see any availability around my dates on BA.com
Has that option gone? Not a huge issue, I will have to do HAM-LHR-MAN-LHR-CPH or something on the way through to Asia from South America. Or failing that, fly back to Europe on IB for more TPs and Avios