Holst was educated at Cheltenham grammer school and later at the Royal Collage of Music where he be came a close friend of Ralph Vaughan Williams and together shared a love of old English folk songs and you can hear the simplicity and economy in many of his compositions.
At the onset of World War One, Holst tried to enlist but due to poor health was rejected. He and his wife Isobel then moved to Thaxted in Essex and it is here that he wrote his best known work, the orchestral The Planets Suite

Jupiter (the bringer of jollity)
http://youtu.be/Nz0b4STz1lo
Gustav Holst 1921 (photograph by Herbert Lambert)
For in depth HTTP://en.wikipedia.org/wiki/Gustav_Holst