So, which plan ??
1) Head to wash-room just before 17:30, hope delivery arrives before next 'outage'.
2) Head to wash-room just before 17:30, go again to wash-room when must, hoping Murphy's Law doesn't ring door while you're busy...
3) Head to wash-room just before 17:30, then at ~18:45, then again at ~19:45 because delivery is running late.
4) All of the above.
Yes, #4 as, at 20:49 e-mail arrives saying will now deliver tomorrow...
Thank you, 'Hapless He##mes', recently re-branded as 'Wrong Ev#i Time'...