To note some things:
Going back to Funimation's original
announcement, they have "exclusive international rights to home entertainment, video on demand, merchandise, and broadcast distribution of the series".
MHA was likewise submitted to the Australian Classification Board by Universal Sony Pictures.
Funimation have a distribution agreement with Universal in the US.
UKA's article on this makes it clear they believe Universal UK is distributing the title for Funimation (and I wouldn't be surprised if they have inside knowledge as they have contact with and have run exclusive news with Universal previously). I think the bigger question is whether this is a one off or whether Funimation are going to transition to distributing via Universal in all three territories from now on. Jerome has mentioned more than once on Twitter that he believes that Universal will be distributing for Funimation (and Crunchyroll) in future so...