They still don’t know about Hungary.
But the WRB staff does know that President Roosevelt will imminently release the Statement on Atrocities, which they wrote in February. In this memo to the files, Pehle confirms that the British have been given a copy of the statement, but rather than wait for their comments (and, let’s be honest, criticisms), he was told that it was given to the British for their information only. So that’s something.