To ask Her Majesty's Government further to the Written Answer by Lord Adonis on 28 April (WA 34), what assessment they have made of whether an increase in the proportion of vehicles tested at Holyhead and Liverpool would result in a proportionate increase in prohibition notices for mechanical defects, drivers' hours irregularities or overloading. [HL3907]
The Vehicle and Operator Services Agency (VOSA) monitors prohibition rates carefully both nationally and at individual sites. VOSA's strategy of targeting has led to a steady increase in national prohibition rates since 2003, with a small reduction in 2008-09. Figures for individual sites are more variable. The figures for Liverpool and Holyhead have been placed in the House of Commons Library. The figures vary year on year, but generally reflect the upward national trend. VOSA's planning is based on a 5 per cent increase in prohibition rates for the current year to reflect continuing improvements in targeting. However, increases in checks at any site could lead to higher deterrence which could cause prohibition rates to decline.