Thanks, ladies.  

  I'm feeling a bit better today.  I got to talk to him last night for about 5 minutes.  He seemed more annoyed than anything.  I think his first words were something like, "I'm fine!  They're just being paranoid and insisting on keeping me overnight.  They were going to let me go, but then they changed their minds.  *mutter mutter*"
His family isn't in the area, nope.  He's in Loughborough (though currently in Leicester), sister is in Norwich, and parents/extended family are in Worcestershire.  But since it's the weekend, his parents might be able to make the trip up there.  He didn't say anything about it, but it just seems like something they'd do.
He said they should be letting him go home today.  And silly me, I'm up at 5 AM since it's already 1 PM over there.  I also have my dad's surprise birthday party later this evening...but that'll be after he's probably already gone to bed.