This is a York. Royal Mail probably has thousands of them. My job seems consists mainly of pushing them back and forth to the cage (we still refer to it as the cage, even though since an office renovation it no longer has wire mesh walls). In the morning dozens are delivered to our office holding letters and parcels. Two or three arrive full of specials. First job is to remove them from the york and scan them into the building. Then I push the empty yorks out. When the specials are sorted I wheel in some more yorks containing the local collect parcels and the missorted parcels. Later I wheel in a couple of empty yorks ready to prepare the redelivery items. Drivers come back with items collected from post offices and we stack these on more yorks. During the day people come into the Customer Service Point and drop off packages for return. We collect these in yorks; when they are full they are wheeled out ready to be transported to the mail centre. As the posties return from delivery in the early afternoon they put their undelivered packets in empty yorks, and these are wheeled in to the cage to be booked in to the SPS system. More collections come in late afternoon. More yorks are wheeled in and out of the cage. After the collection driver leaves I tidy up the random empty yorks and stack them on the stage. They are pretty useful bits of kit. Older ones are steel and quite heavy but newer ones are aluminium. Like shopping trollies you occasionally get a temperamental one with wheels that won't go in a straight line. The base of the york lifts so they can stack inside each other when not being used. And I like the way that things in Royal Mail are designed to fit together: the yorks are sized so that four stacks of boxes fit them exactly and then 15 yorks fit exactly in the back of a lorry.
Stay safe. Be kind. Keep your yorks in a row.