Study to Assess Neoadjuvant Durvalumab (D) and Platinum-Based Chemotherapy (CT), Followed by Either Surgery and Adjuvant D or CRT and Consolidation D, in Resectable or Borderline Resectable Stage IIB-IIIB NSCLC (MDT-BRIDGE)

This will be a multicentre, Phase II, single-arm, global study assessing the efficacy and safety of neoadjuvant durvalumab and platinum-based CT, given intravenously, followed by either surgery and adjuvant durvalumab or definitive CRT and consolidation durvalumab in participants with resectable and borderline resectable stage IIB-IIIB NSCLC. Neoadjuvant Period A: All participants will initially receive 2 cycles of neoadjuvant durvalumab + CT (investigator's choice platinum-based) every three weeks. Participants will be assessed for resectability by a multidisciplinary team. Neoadjuvant Period B: Cohort 1: Participants who are deemed eligible for surgery will receive study intervention every three weeks for an additional one and up to two cycles, followed by surgery. CRT: Cohort 2: Participants with unresectable tumours (according to MDT re-assessment) will receive definitive CRT (6 one-week cycles) for approximately six weeks. Both cohorts will then go on to receive durvalumab every four weeks until disease progression or recurrence or up to one year.