A nationwide Vehicle Excise Duty Evasion Survey was undertaken by the Department for Transport during June 2005. The results showed that the vehicle excise evasion rate in traffic in Northern Ireland had fallen from 7.2 per cent. in the 2004 survey to 5.4 per cent. in 2005.
Although 52,552 vehicles were surveyed in Northern Ireland, the sample size was insufficient to calculate a precise figure of evasion in vehicle stock. However, based on the in traffic evasion rate measured in the survey, Driver and Vehicle Licensing Northern Ireland estimates that the number of untaxed vehicles on Northern Ireland roads is approximately 50,000.
Another Vehicle Excise Evasion Survey has been carried out in June 2006 and it is anticipated that the results will be available in the autumn.
The number of untaxed vehicles clamped/seized from the roads in Northern Ireland in each of the last five operational years is:
Number 2001-02 413 2002-03 2,872 2003-04 1,435 2004-05 1,899 2005-06 5,343