Oxford Sparks Big Questions From the Milk on the Move podcast: Purity and Danger
Feb 25, 2026
Bronwyn Percival, technical director at Neal's Yard Dairy who studies cheesemaking microbes. Heather Paxton, cultural anthropologist exploring raw milk regulation. Deborah Valenze, historian of milk and pasteurization. Bill Oglethorpe, London artisanal cheesemaker. They tour a dairy, probe hygiene and microbial management, trace pasteurization’s cultural history, debate the 60-day rule and show how microbes shape flavor and safety.
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London Dairy Run For Raw Milk
- Bill Oglethorpe drives to Common Work Farm at 5am to collect warm milk and rush it back to his London dairy to preserve cheesemaking qualities.
- He pours milk into a hand-hammered copper vat under Bermondsey railway arches and enforces strict hygiene like removing shoes to protect flavor and microbes.
Milk As Cosmic Living Substance
- Deborah Valenze frames milk as a cosmic, living substance whose imagined purity shaped cultural value worldwide.
- That 'cosmic drama' contrasts with earthly realities: milk teems with unseen microbes that both nourish and threaten human consumers.
Cities Made Milk Dangerous
- Urbanization turned milk into a risky commodity because transport and many unseen middlemen increased contamination opportunities.
- Packaging, sealed cans and later pasteurization emerged to hide and manage those many hands and environmental contaminants.