Tory party refers itself to watchdog over alleged data breach

Party reportedly copied in more than 300 email addresses in appeal to supporters to sign up for conference

The Conservative party has referred itself to the data protection watchdog over an alleged data breach after it revealed hundreds of email addresses in a pitch to sign up for its annual conference.

The party's registration team, urging supporters to complete their applications for conference, reportedly copied in more than 300 addresses in a way that they could be seen by all recipients.