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Inclusion Criteria:

1. Participants with physician-diagnosed CRSwNP for at least 12 months prior to Visit 1 that have:

   1. Severity consistent with need for surgery as defined by total NPS ≥ 5 (≥ 2 for each nostril) at screening, as determined by the central reader
   2. Nasal Congestion Score (NCS) ≥ 2 at Visit 1
   3. Ongoing documented NP symptoms over \> 8 weeks prior to screening such as rhinorrhea and/or reduction/loss of smell
2. SNOT-22 total score ≥ 30 at screening (Visit 1)
3. Any standard of care for treatment of CRSwNP provided the participant is stable on that treatment for 30 days prior to Visit 1
4. Documented treatment of nasal polyposis exacerbation with SCS for at least 3 consecutive days or one IM depo-injectable dose (or contraindications/intolerance to) within the past 12 months prior to Visit 1 but not within the last 3 months prior to Visit 1 and/or any history of NP surgery (or contraindications/intolerance to)

Exclusion Criteria:

1. Any clinically important comorbidities other than asthma (e.g. active lung infection, bronchiectasis, pulmonary fibrosis, cystic fibrosis, primary ciliary dyskinesia, allergic bronchopulmonary mycosis, hypereosinophilic syndromes, etc.) that could confound interpretation of clinical efficacy results.
2. Sinus surgery within 6 months of screening visit OR any sinus surgery in the past which changed the lateral wall of the nose making NPS evaluation impossible.
3. Positive COVID-19 PCR test (or COVID-19 rapid test) or COVID-19 entry screening questionnaire during the screening visit. Evaluation will be based on on local standard of care as determined by current local guidelines.
4. Regular use of decongestants (topical or systematic) at enrolment is not allowed unless used for endoscopic procedure
5. Use of immunosuppressive medication (including but not limited to: methotrexate, troleandomycin, cyclosporine, azathioprine, mycophenolate, tacrolimus, gold, penicillamine, sulfasalazine, hydroxychloroquine, systemic corticosteroids or any experimental anti-inflammatory therapy) within 3 months prior to Visit 1 and during the study period. Systemic corticosteroid use is defined as treatment with a burst of systemic corticosteroids for at least 3 consecutive days or a single IM depo-injectable dose of corticosteroids (considered equivalent to a 3-day burst of systemic corticosteroids).
6. Receipt of COVID-19 vaccine (regardless of vaccine delivery platform) 28 days prior to date of IP administration at Visit 3 (randomisation visit).

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