Study of Volrustomig as Monotherapy or in Combination With Anti- Cancer Agents in Participants With Advanced/Metastatic Solid Tumors

Inclusion Criteria: * Age ≥18 at the time of signing the ICF. * Provision of tumor sample to assess the PD-L1 expression (if applicable). * ECOG performance status of 0 or 1. * Measurable disease according to RECIST 1.1 (variations of RECIST 1.1 if applicable). * Life expectancy ≥ 12 weeks. * Adequate organ and bone marrow function. * Body weight \> 35 kg * Capable of giving signed informed consent. Exclusion Criteria: * Spinal cord compression. * For sub-study 1,2,3,4, brain metastases unless asymptomatic, stable, and not requiring steroids for at least 14 days prior to start of study intervention. For sub-study 5, participants with untreated or progressive brain metastases. * For sub-study 1,2,3, participants with primary neuroendocrine, mesenchymal, sarcomatoid histologies, or other histologies not mentioned as part of the inclusion criteria. * Have not recovered (ie, ≤ Grade 1 or at baseline) from an AE due to a previously administered anti-cancer therapy. * For sub-study 2, have had radiotherapy within 2 weeks prior to enrollment. * For sub-study 3,4, participants have contraindications to any of the following drugs: 5-FU, paclitaxel and carboplatin * History of another primary malignancy except for a) Malignancy treated with curative intent with no known active disease ≥2 years before the first dose of study intervention and of low potential risk for recurrence; b) Adequately treated nonmelanoma skin cancer or lentigo maligna, or carcinoma in situ without evidence…