My situation is that we are publishing a list of the top 25 UK figures in a specific technology. We would like to notify those figures that they've been chosen before we publish, but we have not been given their email addresses.
My questions are:
1) If we are able to obtain those email addresses from the public domain (but haven't been given explicit consent from the people to use those email addresses), is it admissible to email them in order to ask them if they want to be featured? Does this fall under 'legitimate interest'?
2) If we message these people on social media instead of emailing (i.e. LinkedIn and/or Twitter), but we are not currently 'connected' to them, is this admissible under GDPR?