The two-day T in the Park festival is in its 13th year

A crowd of about 75,000 are expected on each day

Scottish band El Presidente were among the first groups on stage

The "silent disco", where the music is played to the crowds through special headphones

The slam tent is one of the 11 different music venues at the festival

Fast-rising Newcastle five-piece Maximo Park gave an energetic performance

Billy Boyd took to the stage as part of a protest against international trade law

About a dozen drummers took to the stage as part of a bid to set a new world record for the number of drummers playing simultaneously round the country to back the campaign

Franz Ferdinand promised fans an "exciting rock and roll show"

Kaiser Chiefs lead singer Ricky Wilson jumps for joy on the main stage