After Wood's death, Julian Herbage acted as de facto principal administrator of the Proms for a number of years, as a freelance employee after his retirement from the BBC, with assistance from such staff as Edward Clark and Kenneth Wright. During the tenure of William Glock as Controller of the Proms, from 1960 to 1973, the Proms repertory expanded both forwards in time, to encompass then contemporary and avant-garde composers such as Boulez, Berio, Carter, Dallapiccola, Peter Maxwell Davies, Gerhard, Henze, Ligeti, Lutosławski, Lutyens, Maw, Messiaen, Nono, Stockhausen, and Tippett, as well as backwards to include music by past composers such as Purcell, Cavalli, Monteverdi, Byrd, Palestrina, Dufay, Dunstaple, and Machaut, as well as less-often performed works of Johann Sebastian Bach and Joseph Haydn. From the 1960s, the number of guest orchestras at the Proms also began to increase, with the first major international conductors (Leopold Stokowski, Georg Solti, and Carlo Maria Giulini) performing in 1963, and the first foreign orchestra, the Moscow Radio Symphony Orchestra, performing in 1966. Since that time, almost every major international orchestra, conductor and soloist has performed at the Proms. In 1970, Soft Machine's appearance led to press attention and comment as the first "pop" band to perform there.
after wood's death julian herbage acted as de facto principal administrator of the proms for a number of years as a freelance employee after his retirement from the bbc with assistance from such staff as edward clark and kenneth wright during the tenure of william glock as controller of the proms from 1960 to 1973 the proms repertory expanded both forwards in time to encompass then contemporary and avant-garde composers such as boulez berio carter dallapiccola peter maxwell davies gerhard henze ligeti lutosławski lutyens maw messiaen nono stockhausen and tippett as well as backwards to include music by past composers such as purcell cavalli monteverdi byrd palestrina dufay dunstaple and machaut as well as less-often performed works of johann sebastian bach and joseph haydn from the 1960s the number of guest orchestras at the proms also began to increase with the first major international conductors (leopold stokowski georg solti and carlo maria giulini) performing in 1963 and the first foreign orchestra the moscow radio symphony orchestra performing in 1966 since that time almost every major international orchestra conductor and soloist has performed at the proms in 1970 soft machine's appearance led to press attention and comment as the first "pop" band to perform there