I overheard two lounge attendants talk today: the lounge at E reopens, this time only for a Virgin flight in the morning and the two daily BA flights. According to these source, for the BA flights only business/first pax and BA Silver and up are admitted (i.e., no OW golds etc.) The C lounge also opens when there's more traffic, according to them (it was closed today, Saturday afternoon, but the E lounge is to open at 14:00).
As far as I can tell, though, service/cleanliness in the lounges did not improve yet
Shuly