If Harry will find out about UV, how will it happen?

[zgirnius]

No: HPFGUIDX 163466

Alla:
> Although on the other hand, Voldemort and Harry and Snape together is 
> only likely to happen during final scenes. 

zgirnius:
I tend to think that the Snape and Harry conflict will get resolved one 
way or another before the confrontation with Voldemort. However, there 
is another way Harry can learn of the UV from Voldemort. If he were to 
have one of those dreams, of a meeting between Voldemort and Snape, in 
which the subject came up.

Yes, Harry didn't have any in HBP, but this is not because he has 
learned how to stop having them. Voldemort was actively preventing it 
by using Occlumency against Harry (according to Dumbledore). If he 
stopped, this would be a possibility.

Alla:
> Oh, another related thought that Peter on Voldemort's orders will 
> inform Harry.

zgirnius:
Interesting idea...how would Peter communicate with Harry? (Gee, and 
where is he living? I suspect Spinner's End might be crawling with 
Aurors, just now...)

Another possibility I see is Draco and/or Narcissa. Assuming that 
either the Vow is still in operation, or whatever motivated Snape to 
take the Vow at Narcissa's request is still motivating him, Snape still 
has the problem of protecting the Malfoys from Voldemort. Snape might 
temporarily achieve this through fast talking (Draco did succeed in 
getting the Death Eaters to Hogwarts, and therefore Dumbledore is dead, 
and so on) but I think Snape is smart enough to know any such measure 
is purely temporary. I could see him encouraging them to seek the 
protection of the Order as a longer-term solution.