Link building is among the most important off-page SEO techniques that works for all websites, regardless of the niche and other aspects. Of course, it is more than just about getting backlinks. You have to focus on content creation, because it has to inspire your audience. You need targeted traffic, the benefits of networking with other blogs, and social media presence, which are only possible when the focus is on quality.
Find a company that understands guest posting UK and has worked for the sector. You can also check some of the work they have done so far for reference.