“As the social media landscape ebbs and flows, the team at BBC Research & Development are researching social technologies and exploring possibilities for the BBC. One part of our work is to establish a BBC presence in the distributed collection of social networks known as the Fediverse, a collection of social media applications all linked together by common protocols. The most common software used in this area is Mastodon, a Twitter-like social networking service with around 2 million active monthly users. We are now running an experimental BBC Mastodon server at https://social.bbc where you can follow some of the BBC’s social media accounts, including BBC R&D, Radio 4 and 5 Live. We hope to be able to add more accounts from other areas of the BBC at some point.”
You can follow Lemmy communities from Mastadon but not the other way around. And it doesn’t work well anyway.
You can use Kbin for both Lemmy and Mastadon.
But Mastadon content is not very Lemmy-like so if all you want is the BBC toots, but not a Mastadon account, you might as well bookmark bbc.social and scroll it occasionally.