20 November 2025 Sean Mosby 1479 Case Updates Alison Marie Tarrant v Simon Monkhouse [2025] EWHC 2576 (KB) by Sean Mosby Summary The case was a claim in negligence arising out of complications following bariatric surgery. When he was asked during cross-examination to explain the Bolam test, the Claimant’s expert was not able to demonstrate an accurate understanding of, or ability to explain, the test. Learning points Make sure you understand any legal tests that are relevant to the case. You should understand, and be able to explain, anything you include or reference in your report, including any legal test. Use terminology consistently in your report and oral evidence, explaining any terms that may not be understood by a layperson. If you are a new to the profession or are not fully confident in your expert witness skillset, consider seeking training from a reputable provider, such as the EWI, which covers areas such as report writing, expert meetings, and the key legal tests in your professional area, such as Bolam and Bolitho for clinical negligence. To continue reading you must be an EWI member, become a member and access exclusive content. Already a member? Login More links Link to the Judgment Share Print Tags 11. Report Writing15. Giving Oral Evidence Related articles Expert Witnesses at a Turning Point Podcast Episode 28: Reflections on the EWI Conference 2026 A Day in the Life of a Dangerous Dog Legislation Expert Witness X and Y (Care Proceedings: Fact Finding: Death of a Child: Expert Evidence), Re [2025] EWFC 132 Diclofenac and the risk of post-ERCP pancreatitis Switch article Personal injury litigation in Ireland Previous Article Podcast Episode 19: Transparency and Open Justice Next Article Comments are only visible to subscribers.