Is your iphone set tu se SecureDNS ?
The Safeguard system operates by assigning a different set of DNS servers to your router. If the iphone is set for secureDNS then it will be overriding the Plusnet supplied ones and so Safeguard will not work.
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.
