Relaxed organ teaching from Dan Moult (left foreground) on an exceptional house organ in Tring, Hertfordshire.   Every February for the past five years Ian and Hilary Needleman have hosted Bachhaus: a day workshop on the music of Bach based around the fine 1994 William Drake house organ in their home in Tring, Hertfordshire. The tutor for each Bachhaus has been Daniel Moult, Head of Organ Studies at Royal Birmingham Conservatoire, and the workshops have focussed on different aspects of Bach’s organ music, such as Bach the Instrumentalist, Bach the Vocalist, and Bach and Word Painting.…