I played four voluntaries by John Christmas Beckwith to demonstrate the various colours of the Georgian organ - diapasons (open and stopped together), trumpet (with echo), flute (at 4ft pitch), bassoon (vox humana in the lower registers), cornet (with echo) and the full organ with trumpet. The Beckwith voluntaries I recorded during my afternoon practice session, and can be seen on YouTube - go to the 'Gorgeous Georgians' page, scroll down to John Christmas Beckwith and click on the titles.
These I followed with four pieces by women composers, two of them 'Gorgeous Georgians' in their own right: Esther Elizabeth Fleet and Elizabeth Turner. It was interesting to reinterpret Turner's harpsichord 'Lesson' as an organ voluntary!
As there were not enough programmes to go round (two in all!), I had to give a running commentary, but for those who want to read it, I post it below for downloading.