[holding answer 2 April 2009]: The data required to provide the number of cattle slaughtered specifically because of irregularities with their passports in each of the last 10 years are not held in a form that is easily accessible. As the extraction and collation of these data would require a considerable amount of work and incur an unacceptable cost an answer cannot be provided. The data recorded monitor cattle slaughtered owing to the broader category of identification irregularities.