Privacy Policy

This is the best guide I've found to what is changing - www.which.co.uk/consumer-rights/regulation/general-data-protection-regulation-gdpr

Basically it should give you more control over what companies do with your personal data and also means they can't automatically opt you in to having your data used, or sending you marketing emails, etc.

Regarding all the emails you're getting, you don't really need to do anything - but bear in mind some of them are asking you to opt back in to receiving email updates, so if you don't respond you won't get info from them any more.