Case Nos: CA-2024-002655/002675/002676 - [2025] EWCA Civ 936

The expert witnesses

The Claimants called Professor Ian Hickson (cancer biologist) and Professor Andrew Westwell (medicinal chemist). Astellas called Professor Noel Clarke (cancer biologist) and Professor Simon Ward (medicinal chemist). The only witness whose evidence was criticised was Prof Ward. The judge considered that some of the Claimants’ criticisms of Prof Ward were justified.