You can try to get her on CO100 EWR-MAN. It's delayed 1hr 20min at this point, departs at 2321EDT estimated and arrives into MAN at 1035. It is showing economy full, but others may misconnect as well.

Otherwise, see if they'll get her on CO18 EWR-LHR in the AM.

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Re-reading your post, I realize you already tried the MAN flight. So that doesn't help.