My father recently received an email from the Egea Trust, offering essentially £500 cash in exchange for generic information about his offspring.
The link in the email which points to an email list domain (eagatrust.us8.list-manage.com) and searches on google both end up going to the same place; Eaga Trust. The Trust is something my Dad is already a member of, and they've previously paid out cash in the past that seem to be just about distributing funds to members.
In short, it does not appear to be a scam, but I'm struggling to find out why the Trust believes the information is worth £500 per child.