“However, my concern is that Dr Birch, on the basis of the evidence that she gave to the court, has in my judgment an erroneous confidence in the accuracy and reliability of the statistical methods that she has employed. That misplaced confidence undermines the other evidence that she has given. It appears to me that that confidence leads her to rely primarily upon her statistical methods. Therefore, she is very likely to be biased in her assessment of age by reason of that misplaced confidence. Therefore, it seems to me that I must approach with very great caution the conclusions that she has reached. In short, I do not believe that Dr Birch’s assessment of the age of the applicant is any more reliable than that of a social worker.”