representatives from each sector are selected, with record companies represented by the major label corporations WMG, Sony Music and UMG alongside a couple of large independents, BMG Rights Management and PIAS Group. The Chart Supervisory Committee is the body which discusses and decides on any chart rule changes, whether it be changes to physical/digital formats or with the chart ratios ACR and SCR (Accelerated Chart Ratio and Standard Chart Ratio), with representatives meeting approximately four times a year. See also UK Albums Chart UK Singles Chart UK Video Charts UK Singles Downloads Chart UK Album Downloads Chart British Phonographic Industry (BPI) References External links Official Charts website Music organisations based in the United Kingdom 1969 establishments in the United Kingdom