The Ministry of Sound has been forced to suspend its plans to pursue thousands of people alleged to have shared music illegally online.
Its solicitors had been trying to get a court order to obtain the names and addresses of the connection owners.
Attempts to obtain the details had been delayed following concerns from BT about how its customers’ data would be used and stored.
The case was abandoned after it emerged that BT had deleted 80% of the data.
Read more on BBC.