Last year, fields of maize were harvested for biomass near Hitchin and the chopped maize stored in long sealed bags at the field edge (at a guess about 15ft wide and well over 100ft + long - like an enormous sausage). Passed the site today and saw this machine, a Ropa Euro Maus, waiting to unload the bag into a large articulated lorry. Unfortunately, I didn't see it in action because the lorry it was loading had got stuck in mud. After a few attempts of using a JCB telehandler to push it free, the lorry had to empty out its load (walking floor, not a tipper) until it was light enough to be pulled out using the JCB and a heavy chain. The lorry then drove off, empty.
I had only ever seen machines like this on YouTube used to load sugarbeet from stockpiles in fields into lorries - with a different header. I decided to adjust the photo I took and make it into a rather more interesting illustration on my iPad.