You can try the digital toolkit and see for yourself if this is a realistic pathway for a small site (such as a blog with a comment function). Personally, I find it puzzling that Ofcom thinks what they provide is helpful to small sites. Furthermore, they make it pretty clear that they see no reason for a purely size-based exemption (“we also know that harm can exist on the smallest as well as the largest services”). They do not explore ways to reach their goals without ongoing collaboration from small site owners, either.