The Proms September 2011, a Prom given by the Israel Philharmonic Orchestra was severely affected by interruptions from pro-Palestinian protesters. While the Palestine Solidarity Campaign had urged a boycott, they denied being behind the disruption inside the Royal Albert Hall. For the first time ever, the BBC took a Prom concert off the air. Successive Controllers of The Proms after Glock have been Robert Ponsonby (1973–1985), John Drummond (1986–1995), Nicholas Kenyon (1996–2007), and Roger Wright (2007–2014). Edward Blakeman, editor of BBC Radio 3, became interim Proms Director upon Wright's departure in July 2014. In May 2015, the BBC announced the appointment of
The Proms 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,