A516Digital has seen reports on Shopping TV forums (yes, there apparently is such a thing) that Sewing Quarter is going to close.
https://mobile.twitter.com/a516digit...39668593991681
They are 8am to 1pm on the Freeview stream that PBS America has just moved onto. If PBS America knew, maybe they have already arranged to take this space when it is vacated when they struck their deal for the 1pm to 11pm slot.
Alternatively another temp mux channel may decide a morning slot on a main multiplex is better than an uncertain DTT future on a temporary multiplex with less coverage.
There is actually space from 5am to 8am on this stream, so whoever gets later morning slot could take this up too. This 3 hour space seems to act as a padding between Adult channels ending and others taking over currently. There is a similar (but not same length) padding on some other streams that share with Adult channels.
See timesharing on multiplexes here
http://www.xhxf.uk/timeshares/