The dumper semi-trailer is a type of commercial vehicle used for transporting loose materials such as sand, gravel, or dirt. It
typically consists of a dump body mounted on a semi-trailer chassis, with hydraulic cylinders used to lift the body and unload the
material. In the UK, the number of dumper semi-trailers registered has been decreasing from 17,700 in 2010 to 11,800 in 2020,
according to the “Number of registered rigid lorries in the United Kingdom (UK) from 2010 to 2020, by weight class (in 1,000
vehicles)” report. In terms of the market share of different types of commercial vehicles in the UK in 2020, dumper semi-trailers
accounted for a small proportion, with a market share of 0.01%, according to the “Distribution of licensed commercial vehicles in
the United Kingdom (UK) in 2020, by body type (in 1,000 vehicles)” report.