The following photo's were captured from a Channel 4 documentary that aired in 1997 by Adrian Medcalf.
Oliver Postgate and Peter Firmin
Oliver Postgate and Bagpuss
Oliver Postgate and Peter Firmin in the Smallfilms studio with the Clangers set
Unpacking the Clangers
Oliver Postgate and Peter Firmin with the Soupdragon
Oliver Postgate and Peter Firmin with the Ivor the Engine film set