it will be recalled that this working group was established pursuant to a decision of the security council.
The phrase also appears here as:
It will be recalled that the laureate has made it known that he did not wish to accept the prize.
Given that recall means remember, the phrase should mean it will be remembered that. My suspicion is that it is used to remind rather than to remember, as in "you should remember that" or "it should be noted that" or "I'd like to remind you that". Does it mean any of these, or does it mean "everyone will remember that"? or something else? And is it good English? because it seems to me not straightforward.