Thee aspprox. 1hr recordings have just come to light, although they have been on Usenet for 3 years.

Richard Digance and Friends - Elkie Brooks, Tim Hinkley, Steve Womack, John O'Connor (Capital Radio 1980-09-21) - 160.mp3
Richard Digance and Friends - Dick Gaughan, Carlene Carter (Capital Radio - Autumn 1980) - 160.mp3
Richard Digance and Friends - Dougie MacLean, Jack Hudson, Pat Rogers (Capital Radio 1980-09-14) - 160.mp3
Richard Digance and Friends - Dougie MacLean, Jack Hudson, Pat Rogers (Capital Radio 1980-09-14) Minus ads - 160.mp3
Richard Digance and Friends - Elkie Brooks, Tim Hinkley, Steve Womack, John O'Connor (Capital Radio 1980-09-21) - 160.mp3
Richard Digance and Friends - Elkie Brooks, Tim Hinkley, Steve Womack, John O'Connor (Capital Radio 1980-09-21) Minus ads - 160.mp3
Richard Digance and Friends - Eric Bogle and Tony Capstick (Capital Radio 1980-ish) - 160.mp3
Richard Digance and Friends - Eric Bogle and Tony Capstick (Capital Radio 1980-ish) Minus ads - 160.mp3
Richard Digance and Friends - John and Sue Kirkpatrick, Eddie Walker, Doug Malta (Capital Radio 1980-ish) - 160.mp3
Richard Digance and Friends - Jonathan Asprey, John Forman, Richard Cox Smith (Capital Radio 1980-mm-dd) - 160.mp3
Richard Digance and Friends - Loudon Wainwright, Waterfall (Capital Radio 1980-11-29) - 160.mp3
Richard Digance and Friends - Martin Carthy and The Watersons (Capital Radio 1980-ish) - 160.mp3
Richard Digance and Friends - Michael Chapman, English Tapestry, Chris Pearson (Capital Radio 1980-mm-dd) - lhr - 160.mp3
Richard Digance and Friends - Richard & Linda Thompson, Simon Nicol, Derek Brimstone (Capital Radio - Probably 1980-12-07) - 160.mp3

Download link