Sam Smith, Chvrches, George Ezra and more pay tribute to DJ
Breakfast presenter Nick Grimshaw plummets to record low
Bombay Bicycle Club, Ed Sheeran, Clean Bandit, Hozier and Black Sabbath also take home awards at 2015 ceremony
The shop has been located on Soho's Berwick Street for the past 20 years
Retiring US TV host also honoured by Courtney Love, St Vincent and Bastille
'Ultimate DJ' winner will get a headline spot at a major electronic music festival and be offered a record contract with Ultra Records and Sony Music
The club has been forced to close at midnight, putting the late-night venue at risk