https://www.bailii.org/ew/cases/EWHC/QB/2019/3408.html
249. Mrs Van Den Bogerd was in the witness box for in excess of one day, the longest period of any of the witnesses of fact for either the claimants or the Post Office. Her cross examination led to a far greater understanding of the Horizon Issues on the part of the court, although her written evidence was, as originally drafted, extraordinarily one-sided. She minimised any reference to problems or issues with Horizon, and reverted to potential user error whenever possible as a potential explanation, an approach which she explained in her written statement as providing “plausible” explanations. Her witness statement also stated, in terms, the exact opposite of what the reality of the situation was, and I have given examples at [221], [223] and [226] above. Witness statements are supposed to be factually accurate, and care must be taken in future rounds of this group litigation that they are drafted in accordance with the rules. Making statements that are the exact opposite of the facts is never helpful, to put it at its mildest. It is also the opposite of what witness statements are supposed to be.[...]
928. The approach by the Post Office to the evidence of someone such as Mr Latif demonstrates a simple institutional obstinacy or refusal to consider any possible alternatives to their view of Horizon, which was maintained regardless of the weight of factual evidence to the contrary. That approach by the Post Office was continued, even though now there is also considerable expert evidence to the contrary as well (and much of it agreed expert evidence on the existence of numerous bugs).
929. This approach by the Post Office has amounted, in reality, to bare assertions and denials that ignore what has actually occurred, at least so far as the witnesses called before me in the Horizon Issues trial are concerned. It amounts to the 21st century equivalent of maintaining that the earth is flat.