What do I need to consider when storing email addresses and phone numbers
Where a response to a canvass communication contains individuals’ email addresses and/or telephone numbers you should ensure that these are recorded, in accordance with data protection legislation requirements, and that this information is only used for the purpose for which it was collected.
If you have existing records of email addresses or phone numbers, at the time that you next use that information, you should ensure the data subject is aware of how you will continue to process this data such by:
explaining the data subjects right to object to further processing