It was on the tip of Bill's tongue to make a comment about how the Imperius was likely to make one do that. But he didn't need to draw attention to himself. And he had Fleur to think about now too.
"Selwyn," he said, squeezing the other bloke's hand just a tiny bit harder than he had to. "Yes, I know how it is to work out of one's field of expertise. Customer relations isn't really my forte either. Yet here I am." They were still shaking hands. Bill was not going to give in first and he squeezed a bit harder.