In 2000, Slatkin became the chief conductor of the BBC Symphony Orchestra. In 2001, he was only the second non-British person to conduct the Last Night of the Proms (the first had been an Australian, Sir Charles Mackerras). This performance occurred in the wake of the September 11, 2001 terrorist attacks, and included changes to the traditional second half of the concert, most notably a performance of the Barber Adagio for Strings in honor of the victims. He held this post until September 11, 2004, the 110th Last Night. There were reports of tension between Slatkin and the orchestra, whose secure finances were said to have "fostered a culture of superiority and recalcitrance," as well as negative concert reviews, which contributed to his short tenure with the BBCSO. Previously in the UK, Slatkin was principal guest conductor of the Philharmonia Orchestra from 1997 to 2000 and made a series of digital recordings for RCA with them, including the symphonies of Ralph Vaughan Williams. In 2004, the Los Angeles Philharmonic named him principal guest conductor at the Hollywood Bowl for a two-year period; he was subsequently given a third year in the position, with his tenure ending in September 2007. In 2005, he became the principal guest conductor of the Royal Philharmonic Orchestra, London.
