yeah, it was Crabbe, he pretty much killed himself seeing as he started the fiendfyre. Ron, Hermione and Goyle were on 1 broomstick and Harry and Malfoy on the other.
same with the septasempra curse ( apologies for bad spelling) the books by rowling admission get darker so they gonna have to gamble with a 12 A rating I think
If you click on the picture you get a bigger version. If you look at the right hand edge of the building there is a purple and orange sign which looks to have a 'W' on it. So judging from the evidence I think it might just be