"Information board"

Went to MIU at 17:20 with an elderly relative who had cut her leg.  At the time, the information board at reception said a 2.5 to 3 hour wait.  Waited in the waiting room until around 18:00 then went to the toilet and saw that the information on the board had changed to 'Triage only, signposting to other services'.  Thought this felt a bit early as MIU does not close until 20:00.  As it turns out, my elderly relative was seen around 19:00 and treated very well by MIU member of staff, so we left more than happy.

I can understand if it is getting towards closing time for such a message to be put onto the information board, however this seemed unreasonably early.