Platform Trial of Novel Regimens Versus Standard of Care (SoC) in Participants With Non-small Cell Lung Cancer (NSCLC) - Sub-study 1

Inclusion Criteria

• Participants capable of giving signed informed consent/assent.
• Male or female, aged 18 years or older at the time consent is obtained. Participants in Korea must be age 19 years or older at the time consent is obtained.
• Participants with histologically or cytologically confirmed diagnosis of NSCLC (squamous or non-squamous) and

a) Documented disease progression based on radiographic imaging, during or after a maximum of 2 lines of systemic treatment for locally/regionally advanced recurrent, Stage IIIb/Stage IIIc/Stage IV or metastatic disease. Two components of treatment must have been received in the same line or as separate lines of therapy: i) No more than or less than 1 line of platinum-containing chemotherapy regimen, and ii) No more than or less than 1 line of Programmed cell death ligand 1 (PD[L]1) monoclonal antibody (mAb) containing regimen.

b) Participants with known BRAF molecular alterations must have had disease progression after receiving the locally available SoC treatment for the molecular alteration.

c) Participants who received prior anti-PD(L)1 therapy must fulfill the following requirements: i) Have achieved a CR, PR or SD and subsequently had disease progression (per RECIST 1.1 criteria) either on or after completing PD(L)1 therapy ii) Have not progressed or recurred within the first 12 weeks of PD(L)1 therapy, either clinically or per RECIST 1.1 criteria

• Measurable disease, presenting with at least 1 measurable lesion per RECIST 1.1.
• Eastern Cooperative Oncology Group (ECOG) Performance Status (PS) score of 0 or 1.
• A tumor tissue sample obtained at any time from the initial diagnosis of NSCLC to time of study entry is mandatory. Although a fresh tumor tissue sample obtained during screening is preferred, archival tumor specimen is acceptable.
• Adequate organ function as defined in the protocol.
• A male participant must agree to use a highly effective contraception during the treatment period and for at least 120 days after the last dose of study treatment and refrain from donating sperm during this period.
• A female participant is eligible to participate if she is not pregnant, not breastfeeding, and at least 1 of the following conditions apply:

i) Not a woman of childbearing potential (WOCBP) or ii) A WOCBP who agrees to follow the contraceptive guidance during the treatment period and for at least 120 days after the last dose of study treatment.

• Life expectancy of at least 12 weeks.

Exclusion Criteria

• Participants who received prior treatment with the following therapies (calculation is based on date of last therapy to date of first dose of study treatment):
• Docetaxel at any time.
• Any of the investigational agents being tested in the current study.
• Systemic approved or investigational anticancer therapy within 30 days or 5 half-lives of the drug, whichever is shorter. At least 14 days must have elapsed between the last dose of prior anticancer agent and the first dose of study drug is administered.
• Prior radiation therapy: permissible if at least one non-irradiated measurable lesion is available for assessment per RECIST version 1.1 or if a solitary measurable lesion was irradiated, objective progression is documented. A wash out of at least 2 weeks before start of study drug for radiation of any intended use is required.
• Received greater than (>)2 prior lines of therapy for NSCLC, including participants with BRAF molecular alternations.
• Invasive malignancy or history of invasive malignancy other than disease under study within the last 2 years, except
• Any other invasive malignancy for which the participant was definitively treated, has been disease-free for at least 2 years and in the opinion of the principal investigator and GlaxoSmithKline Medical Monitor will not affect the evaluation of the effects of the study treatment on the currently targeted malignancy, may be included in this clinical trial.
• Curatively treated non-melanoma