How many hijets are still on the road in the UK

Where does the data come from?
The data is based on the "Vehicle licensing statistics" data published by the Department for Transport, which in turn is extracted from the DVLA's vehicle database.

The following tables of statistics are used:

VEH0120 Licensed vehicles by make and model, Great Britain, quarterly from 1994
VEH0121 Vehicles with a Statutory Off Road Notification by make and model, Great Britain, quarterly from 1997
VEH0124 Licensed cars by make and model, by year of first registration, Great Britain, annually from 2010
VEH0125 Cars with a Statutory Off Road Notification by make and model, by year of first registration, Great Britain, annually from 2010
VEH0126 Licensed cars by make and model, by year of manufacture, Great Britain, annually from 2011
VEH0127 Cars with a Statutory Off Road Notification by make and model, by year of manufacture, Great Britain, annually from 2011
VEH0160 Vehicles registered for the first times by make and model, Great Britain, annually from 2001