The Department for Transport has not made an assessment of the benefits of ensuring that public service vehicle operators cannot use tyres over a certain age, and has not commissioned any research on the role played by old tyres in public service vehicle crashes. Her Majesty's Coroner for Surrey has written to the Secretary of State following an inquest into a tragic incident on the A3 in Surrey last September. The Department's officials are considering the information provided by the Coroner and I will respond to him in accordance with the established procedure.