This local council had a small breach whereupon they sent an email to over 1,000 people where all recipients could see all the other email addresses that the message was sent out to. It was reported that this was due to a staff member making a mistake when sending the email.
People affected / impacted:
This is a local authority as opposed to a company.
Information on legal proceedings and how to go about gaining financial compensation including class action lawsuits you can join and breaches you are impacted by are available to registered users.