If that is correct it suggests Derry is also ending as Tue-Thu-Sun correlates with the Wizz to Bucharest, although Tuesday now seems to have been taken off sale and as I said above tonight’s is cancelled. Even with Loganair, terminal hours would only need to be about 5-8pm.
Another possibility is Loganair will operate Tue-Thu-Sun to coincide with the Wizz flights as it doesn’t make sense for check-in, security staff to come in for about 10-20 pax. As a side note, Loganair’s Dundee service will need somewhere to go as it’s due into LCY from Sunday but of course LCY is closed. It could continue to STN but that seems even more of a waste of time costwise as it would also be the only departure there around that time.