you have given us, that people i have had on the programme not so long ago, henry march, one of britten'srank about the fa ct you have both been frank about the fact that you and others have sometimes made mistakes, sometimes you feel you have let patients down. we really want to know all this? well, perhaps i should ask you that. laughter. welcome a good hard to talk question. sometimes i think we would rather not know the degree to which chance is relevant in any serious intervention that you make. i think that is true that in heart surgery, we are i think that is true that in heart surgery, we are extremely honest about the downside. we give patients risks, calculated properly, scientifically, as percentages, we tell them the likelihood of death, likelihood of stroke, likelihood of not getting a good outcome. we tell them the benefits and we tell them to weigh these things so at least we are being honest. nowadays, patients no longer accept the patriarchal approach of well, you know, that you are, my good man. i know what's best for you. that's not good enough. i certainly wouldn't wan