One out, one in.

The Post Office was only allowing one customer in at a time.  Perfectly reaonable in the circumstances.  In general the queue outside was fairly orderly, with most people keeping the required 2m space from each other.  That didn't stop one woman complaining about the length of the queue, getting cold waiting outside and some complaint about the staff.

As I left the Post Office I did thank the lady operating the door for keeping everyone under control - including the whingers.  She said that there had been quite a few of those.  It seems that, even now, some people just don't get it.