Let me get this straight. She MET him........once, twice? How would that cause her to be "acquainted" with him? Can you provide evidence of "nights on the town" together with evidence that they singled each other out for conversation and/or exchanged names/addresses/phone numbers? Julie lived in London. In a house from which outgoing calls couldn't be made. She couldn't contact him. Did she meet with him each and every time she visited Jeremy? Did she meet with those who may have known him very time she visited Jeremy? I'd like to know how you define "acquainted".
Who knows how many times she may have met him ? NONE of us can say,can we as he seemed to have been in the company of the usual clique in pubs and nights out. ?
As it happened,JM was with JB,not MM,but she'd have known about him all the same. As for the term " nodding acquaintance ",well you can always refer to that,being as you're so pedantic.