From the BBC4 Web site, verbatim:

50 Years of Sidmouth Folk
Established folk icons and the rising stars of the folk scene gather to celebrate 50 years of the Sidmouth International Folk Festival.

Kate Rusby, John McCusker, The Waterson Family, Danu, Steeleye Span and Spiers and Boden perform against the beautiful backdrop of the Devon Coast.

Presented by Eliza Carthy

(It's repeated at 1 am the same night, and again on Sunday evening)