Join Rich Wright, a conservation mycologist with over 20 years' experience in fungal ecology, rare species translocation and cultivation, for a talk on rethinking decay in Britain's oaks. Having held posts at Kew, Cardiff University and Plantlife, Rich brings deep scientific and field knowledge to heart-rot, a process often misunderstood despite its huge value for woodland biodiversity. The talk draws on years spent among ancient oaks and their fungi, exploring what decay can teach us about the living world, and ourselves.

Tickets £12 from Hay Castle website