The Virus Safe aspect of VM DNS is blocking access to the website.
>nslookup healthplusmore.co.uk
Server: cache1.service.virginmedia.net
Address: 194.168.4.100
Non-authoritative answer:
Name: healthplusmore.co.uk
Addresses: 2a02:8801:200:1::1
81.99.162.48 ( these are both IPs that belong to VM )
>nslookup healthplusmore.co.uk 8.8.8.8
Server: dns.google
Address: 8.8.8.8
Non-authoritative answer:
Name: healthplusmore.co.uk
Address: 192.124.249.176 ( this is the correct IP of the website )
Try some of the public virus check services to see if your web site shows up as problematic
https://www.google.com/search?client=firefox-b-e&q=virus+check+website
If it turns out as all clear drop a message to websafefeedback@virginmedia.co.uk
reporting the web site as being blocked unexpectedly.