Read this article from the Guardian about Gordon Brown's critque of the current health minister's ideas about restructuring of the NHS arguing that "payment for services will end up with people missing early diagnoses and undermine the entire basis of the NHS." He cites Sir Michael Marmot's work on health inequalities as reason for bolstering the NHS as opposed to moving to private payer systems. 

Full text: https://www.theguardian.com/politics/2023/jan/23/gordon-brown-warns-tories-two-tier-healthcare-system-charges-undermine-nhs