“… the contribution was more than "de minimis". It is insufficient for a Claimant to identify one of a number of potential causative pathways (Wilsher v Essex HA [1988] AC 1074), but the principle of material contribution is equally applicable in multiple factor cases as it is in single agency cases (per Picken J in John v Central Man…”
“…nly one possible candidate. The case should have been treated as falling within the ambit of the principles enunciated in Wilsher v Essex Area Health Authority [1988] AC 1074: Wilsher.…”