The Shadows (originally known as the Drifters) were an English instrumental rock group, who dominated the British popular music charts in the late 1950s and early 1960s, in the pre-Beatles era. They served as the backing band for Cliff Richard from 1958 to 1968, and have joined him for several reunion tours. The Shadows have had 69 UK chart singles from the 1950s to the 2000s, 35 credited to the Shadows and 34 to Cliff Richard and the Shadows. The group, who were in the forefront of the UK beat-group boom, were the first backing band to emerge as stars. As pioneers of the four-member instrumental format, the band consisted of lead guitar, rhythm guitar, bass guitar and drums. Their range covers pop, rock, surf rock and ballads with a jazz influence.The core members from 1958 to present are guitarists Hank Marvin and Bruce Welch and drummer Brian Bennett (who has been with the group since 1961) with various bassists and occasionally keyboardists through the years. Along with the Fender and the Burns guitars, another cornerstone of the Shadows sound was the Vox amplifier. Around 1964, the Shadows replaced the Fender with the Burns, Bruce Welch citing tuning issues as the main reason.