It does seem like a suspiciously timed update at first glance, especially given the topic. Having said that, the guidance does say that you are allowed to…
publish factual information to counteract misleading, controversial or extreme (for example, racist/sexist) information
That doesn’t seem completely unreasonable given the recent speculation about Allington. It certainly seems worth asking the question about whether the statement stepped over the line though.
Unfortunately, it’s not the only incident which might be in breach of election rules: