I've had some progress with Eden communications. They still insist they can keep sending the spam (so later I shall discuss this with the information commissioner, watch this space for the results), but they did provide the contact details of the company they bought the list from. The company that sold this list also tried to call me as well. Always wanting to give people the benefit of the doubt, we shall call the sending company "T". "T" insist they bought the addresses in good faith, so I will be emailing them to ask for the details of the company they bought them from. By the way, the reason for that strange domain name used in sending spam (mail-2204vf49.co.uk) is because they use it to track campaigns. Sounds resonable but I still have many unanswered questions. Still, lets give them the benefit of the doubt and a chance to answer before jumping to conclusions.