I have a band website that has no profanity or sexual stuff on it and BT has blocked it, the site is www.blackholelovers.com and it refers to a black hole is a region of spacetime where gravity is so strong that nothing—no particles or even electromagnetic radiation such as light—can escape from it. The theory of general relativity predicts that a sufficiently compact mass can deform spacetime to form a black hole. The boundary of no escape is called the event horizon.
We are releasing an EP soon, and request BT unblocks the site and stops listing it is harmful content.
Both those sites are unreachable on VirginMedia too - so I think the issue is elsewhere. Tried a couple of different VPNs too.
I'd contact your hosting company, your website is available via BT/EE mobile network but from a BT broadband connection even a trace and ping don't work, @ozsat tried without success from a VM connection as well, it's not a block, more likely the DNS settings.