91 What is important is whether the applicant could, in any real sense, be said to have had a free choice to speak or remain silent. In our view, the Judge fell into error by divorcing the interview from the context in which it occurred, a context which his Honour found operated on the will of the applicant. It is necessary, when considering the admissibility of an inculpatory statement made by a person in the course of a police interview, to bear in mind that evidence of this kind differs from most other forms of evidence. The most obvious difference, which has long been identified and to a large extent underlies the principles governing the admissibility of such evidence, is that the evidence comes into existence at the time of the interview and is a product not only of the interview itself but of many factors, both external and personal to the maker. Whether or not an individual decides to speak or remain silent, and the content and form of any statement made, will inevitably be influenced by his perception of the situation in which he is placed at that time.