I cannot create a summary of this article because its content is not available in the search results provided. Although the results include information about Andrew Pollard as the director of the Oxford Vaccine Group and his long-standing position on the UK's vaccine advisory committee, the article itself from The BMJ entitled "UK is better protected than US against vaccine politicisation—but is not immune, top adviser warns" is not included in the materials. In order to create an accurate and factual summary as per your requirements, I would need access to the full text of the article.