I have spotted this bike and its rider around Manchester several times over the last few years, usually around the city centre. I have never been able to get a proper look at it, until now. It is called an 8 Freight, and it reminds me of a Madsen bucket bike, or a Bakfiets with the box at the back. Apart from a one-off sighting of a Surly Big Dummy it is the only other cargo bike I have seen in use in the city.
I can understand the choice to use 20-inch wheels, due to their increased strength. This is also done on the Madsen bikes.
This design choice is a little more puzzling, a single blade fork seems an odd choice for a load-carrying bike. The bike is designed by Mike Burrows, a look at his other bikes might explain why he went for the single blade aesthetically, in addition to the rather steep head and seat-tube angles for a cargo bike.
Drum brake on the front. According the the spec this is a Sachs, which is now SRAM. Oddly, SRAM state that their drum brakes are unsuitable for 20-inch wheels. They should give a lot of stopping power on such a small wheel.
Interesting method to get the chain underneath the box. Also note the wide kick-stand.
Again the wheel is attached to the frame at one side only. Another Sachs drum brake and a 6-speed freewheel/cassette. the spec shows an 8-speed cassette and the name suggests it was originally an 8-speed. Considering the length of the gear cable, and the tolerances involved in getting reliable shifting it makes sense to convert it to a 6 speed.
Hopefully the cargo bike will continue to grow in popularity and will become a more common sight on our streets.