The Department for Education and Skills will go to the High Court next month to try to revoke a patent on a system which transmits data about pupil attendance wirelessly. Frontline Technologies has been asking schools for up to pound;1,500 if they buy products made by competing companies which use its patented technology. Since November 2002 the DfES has advised schools against taking out licences offered by Frontline and Bromcom plc, both owned by London businessman Ali Guryel. Rival companies which will benefit from the end of the patent include Capita, which has called on the DfES to revoke it.