AH! That would explain it - thanks for that. I can only hear it on an A319 and it's pretty loud - on a 747 it must be defeaning!
I did post a link to a popular video website
which actually plays out this noise but the post is in the hands of the mods. I did a search on that video website of 'windmilling'
Thanks again! Looking forward to checking in here with more stuff soon, have my Monday morning flight tomorrow
