A drop in file-sharing following a court ordered block of the Pirate Bay was short-lived, data seen by the BBC suggests. A major UK internet service provider (ISP) said peer-to-peer (P2P) activity on its network returned to just below normal only a week after the measures were enforced earlier this year. Critics had warned the ban would prove ineffective. But the BPI, the music industry trade body, has defended the action. Its chief executive Geoff Taylor told the BBC the group would continue to pursue similar action in future.