Georgian London was a glorious and artistically rich era, with a dynamic musical life, whether in concert halls, opera houses, churches or pleasure gardens. On his new album, From Palaces to Pleasure Gardens, released on the Regent label, organist Thomas Trotter celebrates this period with a programme of music performed on the newly restored 1735 Richard Bridge organ of Christ Church, Spitalfields. In this week's Gramophone podcast he talks to Editor Martin Cullingford about the works he's chosen, and about the extraordinary instrument he has recorded them on.