"The current practice, which Arnold J understandably followed, is to allow the evidence in unless the judge can be satisfied that it will be valueless. In my judgment that is the wrong way round. I consider that, even if the evidence is technically admissible, the judge should not let it in unless (a) satisfied that it would be valuable and (b) that the likely utility of the evidence justifies the costs involved."
"(iv) That evidence can only be probative if those who are called can in some way be seen to stand proxy for the legal construct through whose eyes the essential question [in relation to trade marks] must be judged." "
"The upshot of this review is that courts have allowed the calling of evidence of the kind that Interflora wishes to call and have considered it, either in conjunction with or in the absence of a statistically valid and reliable survey. But it is generally of little or no value. Sometimes it does no more than confirm the conclusion that the judge would have reached without the evidence. In passing off cases it sometimes has greater effect, but as I have said more than once, passing off raises a different legal question. Unless the court can be confident that the evidence of the selected witnesses can stand proxy for the persons or construct through whose perception the legal question is to be answered it simply represents the evidence of those individuals. In a case in which the witnesses are called in order to amplify the results of a statistically reliable survey their evidence may be probative. But unless the court can extrapolate from their evidence, it is not probative."
"In addition I must make it clear, however, that different considerations may come into play: ... (v) Where the cause of action is in passing off, which requires a different legal question to be answered."
"(iii) The goods or services in question are not goods or services supplied to ordinary consumers and are unlikely to be within the judge's experience ... "
"Mr Silverleaf argued that if we acceded to Mr Hobbs' submissions then evidence from consumers would never be admitted in a case of trade mark infringement in the absence of a statistically valid and reliable survey. I do not think that follows. One of the objections to the witness collection exercise, as Rimer J pointed out in UK Channel Management is that the evidence thus collected is not the spontaneous reaction of members of the public who have been exposed to the allegedly infringing sign or advertisement, but is evidence obtained under artificial conditions by applying artificial stimuli. If there is evidence of consumers who have been confused in the real world, there can be no objection to calling it."
"If Interflora cannot prove its case without calling evidence from internet users that would be a powerful reason for allowing such evidence to be adduced."
"... the applicant should provide the court with: i) The results of any pilot survey; ii) Evidence that any further survey will comply with the Whitford guidelines; and iii) The cost of carrying out the pilot survey and the estimated cost of carrying out the further survey."