Staff are saying reservations still apply and that those without or anyone wrongly double booked should go to coach C (and sometimes declassified standard premium). But it appears none are displayed.
When I travelled from Lancaster to Crewe last week, the TM from Lancaster said that all reservations were cancelled, but the TM who relieved her at Preston didn’t make any announcements regarding reservations. One lady got on at Wigan and asked to sit in her booked seat, but there were enough passengers who had been on north of Preston to tell her that they had been cancelled. A bit of a mess when there isn’t even consistency on a single service! (Reservations weren’t showing on the screens.)
Edit: she was able to get a seat, but was a bit put out as she had specifically booked a table seat to do some work.